Merge "libbinder_rs: Use a bindgen flag file" into main am: 8905bf69 am: 02487d82

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/2650996



Change-Id: Iaab761a624d47567d44b4289be238881f18bad45
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>