Merge "Drop prebuilt files to android source tree." am: 89e6a198 am:...

Merge "Drop prebuilt files to android source tree." am: 89e6a198 am: 8a09fc3f am: a1315f75 am: 9d6f9b1f am: f4af4b62

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2454834



Change-Id: I93a2c81e442274bbc10482791b734d127da9a346
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>