------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=174467964
- Dropped class name prefixes that correspond to whole app name - Anything that wraps the player is called PlayerManager ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=173652288
Also do some minor cleanup in other demo apps. ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=173146425
------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=173112608
