Merge "Drop prebuilt files to android source tree." into tm-dev am: 045ab2fc...

Merge "Drop prebuilt files to android source tree." into tm-dev am: 045ab2fc am: d3d834c3 am: 8f20ea31

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/18331943



Change-Id: I67631aa63b39f4130fa44ad2b2470c3572177d9b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>