Merge "Have cargo2android put warning not to modify Android.bp files" am: 5b630e0f9f am: e40c638c41 am: c3f4534f01

Original change: https://android-review.googlesource.com/c/platform/development/+/1594452

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I498d6778f2771caf60e8a22381758533201dbcd6