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: 13a28ae2 am: 8268ec8d am: 780a4225

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



Change-Id: I5e0991bf0fe8c30eb01b90083c09d14f6c4333b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>