Enable bytecode desugaring in Android test projects

After advancing stdlib jvmTarget to 1.8.

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidExtensionsManyVariants/app/build.gradle

@@ -18,6 +18,12 @@ android {
         }
     }
 
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     flavorDimensions "color"
 
     productFlavors {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidExtensionsProject/app/build.gradle

@@ -13,6 +13,12 @@ android {
         versionCode 1
         versionName "1.0"
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidExtensionsSpecificFeatures/app/build.gradle

@@ -13,6 +13,12 @@ android {
         versionCode 1
         versionName "1.0"
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidIcepickProject/app/build.gradle

@@ -24,6 +24,12 @@ android {
         versionName "1.0"
     }
 
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     lintOptions {
         abortOnError false
     }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidIncrementalMultiModule/app/build.gradle

@@ -12,6 +12,12 @@ android {
         versionCode 1
         versionName "1.0"
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
     buildTypes.release.minifyEnabled = false
     lintOptions.abortOnError = false
 }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidIncrementalMultiModule/libAndroid/build.gradle

@@ -11,6 +11,12 @@ android {
         versionCode 1
         versionName "1.0"
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
     buildTypes.release.minifyEnabled = false
     lintOptions.abortOnError = false
 }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidIncrementalMultiModule/libAndroidClassesOnly/build.gradle

@@ -11,6 +11,12 @@ android {
         versionCode 1
         versionName "1.0"
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
     buildTypes.release.minifyEnabled = false
     lintOptions.abortOnError = false
 }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidIncrementalSingleModuleProject/app/build.gradle

@@ -33,6 +33,12 @@ android {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidParcelizeProject/app/build.gradle

@@ -13,6 +13,12 @@ android {
         versionCode 1
         versionName "1.0"
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidProject/Android/build.gradle

@@ -20,6 +20,12 @@ android {
         targetSdkVersion 22
     }
 
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     flavorDimensions "myFlavor"
     productFlavors {
         flavor1 {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidProject/Lib/build.gradle

@@ -20,6 +20,12 @@ android {
         targetSdkVersion 22
     }
 
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     flavorDimensions "myFlavor"
     productFlavors {
         flavor1 { dimension "myFlavor" }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/AndroidProject/Test/build.gradle

@@ -20,6 +20,12 @@ android {
         testApplicationId 'org.jetbrains.kotlin.gradle.test.androidalfa'
     }
 
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
+
     targetProjectPath ':Android'
     if (VersionNumber.parse(android_tools_version) < VersionNumber.parse("3.0.0-alpha1")) {
         targetVariant 'flavor1Debug'

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-inter-project-ic/app/build.gradle

@@ -14,6 +14,12 @@ android {
         versionName "1.0"
         javaCompileOptions.annotationProcessorOptions.includeCompileClasspath = true
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
 }
 
 dependencies {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/android-inter-project-ic/lib-android/build.gradle

@@ -11,6 +11,12 @@ android {
         versionCode 1
         versionName "1.0"
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
 }
 
 dependencies {

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/icAnonymousTypes/build.gradle

@@ -29,6 +29,12 @@ android {
     versionName "1.0"
   }
 
+  // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+  compileOptions {
+    sourceCompatibility 1.8
+    targetCompatibility 1.8
+  }
+
   dataBinding {
     enabled true
   }

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/resources/testProject/kapt2/kt15001/app/build.gradle

@@ -13,6 +13,12 @@ android {
         versionCode 1
         versionName "1.0"
     }
+
+    // Needed for older AGP. It can be removed when the lowest supported AGP version is 4.2.0 or newer.
+    compileOptions {
+        sourceCompatibility 1.8
+        targetCompatibility 1.8
+    }
     
     buildTypes {
         release {