Merge "Add shell command for setting the game mode for a package" into sc-dev...

Merge "Add shell command for setting the game mode for a package" into sc-dev am: 9bfb0f38 am: 4b26d257 am: ba07a8de

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14521282

Change-Id: I6e67279efccc9eecbb96202f7f5634b296311888