message: Switch example Android app back to android.support.test.
  GitOrigin-RevId:
diff: @@ -9,7 +9,7 @@ android {
  targetSdkVersion 26
  versionCode 1
  versionName "1.0"
  - testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
  + testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  }
  buildTypes {
  release {
  @@ -25,7 +25,7 @@ repositories {
  dependencies {
  compile fileTree(dir: 'libs', include: ['*.jar'])
  - androidTestCompile('com.androidx.test.espresso:espresso-core:2.2.2', {
  + androidTestCompile('android.support.test.test.espresso:espresso-core:2.2.2', {
  exclude group: 'com.android.support', module: 'support-annotations'
  // This is already included in protobuf-lite that Tink depends on.
  exclude group: 'com.google.code.findbugs'
  