[samples] Use MPP in the android calculator app

samples/calculator/androidApp/build.gradle

@@ -14,7 +14,7 @@ buildscript {
 }
 
 apply plugin: 'com.android.application'
-apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-platform-android'
 
 android {
     compileSdkVersion 27
@@ -25,11 +25,6 @@ android {
         versionCode 1
         versionName "1.0.0"
     }
-
-    sourceSets {
-        main.java.srcDirs += 'src/main/kotlin'
-        main.java.srcDirs += '../parser/src/main/kotlin'
-    }
 }
 
 repositories {
@@ -39,7 +34,7 @@ repositories {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
-//    implementation "org.jetbrains.kotlin.konan.samples:arithmetic-parser"
+    expectedBy project(':parser')
 
     implementation "com.android.support:appcompat-v7:27.0.2"
 }

samples/calculator/androidApp/settings.gradle

@@ -1 +1,2 @@
-// includeBuild '../parser'
+include ':parser'
+project(':parser').projectDir = file('../parser')