Merge "add script to help override flag value locally" into main am: 6aa030026c am: 5aa790b35e

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

Change-Id: I1d60af4d86f8ed0eb557626f8697260bd1e064cf
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>