message: Disable the jcenter() repo in the Android example Gradle configuration.
  Add mavenCentral() as an additional repo.
diff: buildscript {
  repositories {
  google()
  - jcenter()
  + mavenCentral()
  + // TODO(b/214259089): Disable during service outage.
  + //jcenter()
  }
  dependencies {
  classpath 'com.android.tools.build:gradle:3.6.0'
  @@ -16,7 +18,9 @@ buildscript {
  allprojects {
  repositories {
  google()
  - jcenter()
  + mavenCentral()
  + // TODO(b/214259089): Disable during service outage.
  + //jcenter()
  }
  }
  