Remove BetterBug (and BetterBugStub) from aosp & factory build targets. am: db7b681039

Original change: https://googleplex-android-review.googlesource.com/c/device/google/gs-common/+/27350056

Change-Id: I9654dffa12d9e1c23f8f523a6753b8d48a9cd3b0
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>