Merge "add script to help override flag value locally" into main am: 6aa03002

Original change: https://android-review.googlesource.com/c/platform/build/+/2783484



Change-Id: I290c3a755578f3403d360bfe0d4fc94c47ddd2e3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>