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

Merge "add script to help override flag value locally" into main am: 6aa03002 am: 5aa790b3 am: 77eb2a46

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



Change-Id: I44fdd2f33b3764c14ed949444d82c763b8d1542c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>