Merge "Split gen_bp_files, make Android.bp idempotent." am: 8d6aeab882 am: d0edac4eea am: ae197196ca

Original change: https://android-review.googlesource.com/c/platform/development/+/1450076

Change-Id: I56c1cedcf51deefd7a35e61daae7d4b9467a6d59