Merge "Treat R8 warnings as failures for system_server" am: 1f440e7a62 am: df2014cba1 am: 62fadfafd0 am: d0829e0307 am: 4a346a16ed

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2209838

Change-Id: Ifdd0cbabb1bf2da2eee3ccf0a496a567f660a959
Signed-off-by: Automerger Merge Worker <[email protected]>