Merge changes from topic "cherrypick-android_util-a0ae5zk4cb" into sc-dev

* changes:
  [Mainline] android.system package APIs migration
  Use public android.system.Int64Ref instead of Int32Ref which is hidden (CorePlatformApi) type of libcore
tree: 29702f8bd2b708eccb01376800aa15869452daa4
  1. core/
  2. framework/
  3. service/
  4. services/
  5. tests/
  6. OWNERS