Merge "activate r8 warning as error" into main am: 4257259d am: c77663e4

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/3478011



Change-Id: Ib6b9f913b4868b3ffe836680b1e74021405a05ed
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>