Merge "Treat undefined flags as false in resource flag processor" into main am: 95151f9db5

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/3390279

Change-Id: Ib332d9ec1068deae6c5466469a313ad7e2ce7cec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>