Merge "Treat R8 warnings as failures for system_server" am: 1f440e7a am:...

Merge "Treat R8 warnings as failures for system_server" am: 1f440e7a am: df2014cb am: 62fadfaf

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



Change-Id: I0b4efd58a380853842ec33fb2b7eb33c280155d8
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>