Merge "Drop prebuilt files to android source tree." into sc-dev am: 2ab6db55 am: 6bedc766 am: eba88da4

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15029070

Change-Id: I0f9d7cc1e934941f5231c8162c95ab8278536e3f