Add a basic IR extension to the Android plugin

Only supports uncached findViewById/findFragmentById for now; other
features are experimental and the cache only affects performance, so
this should probably be fine for testing Android apps with -Xuse-ir.

plugins/android-extensions/android-extensions-compiler/build.gradle.kts

@@ -17,12 +17,14 @@ dependencies {
     compileOnly(project(":compiler:frontend"))
     compileOnly(project(":compiler:frontend.java"))
     compileOnly(project(":compiler:backend"))
+    compileOnly(project(":compiler:ir.backend.common"))
     compileOnly(project(":kotlin-android-extensions-runtime"))
     compileOnly(intellijCoreDep()) { includeJars("intellij-core") }
     compileOnly(intellijDep()) { includeJars("asm-all", rootProject = rootProject) }
 
     testCompile(project(":compiler:util"))
     testCompile(project(":compiler:backend"))
+    testCompile(project(":compiler:ir.backend.common"))
     testCompile(project(":compiler:cli"))
     testCompile(project(":kotlin-android-extensions-runtime"))
     testCompile(projectTests(":compiler:tests-common"))