Merge "Drop prebuilt files to android source tree." into udc-dev am: 8c7268f9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/23113698



Change-Id: I63534091192f96bcafd65b8dad9c6f95bcd45f8c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>