Merge "Drop prebuilt files to android source tree." into sc-dev am: 0def7266...

Merge "Drop prebuilt files to android source tree." into sc-dev am: 0def7266 am: f59e37a6 am: 2520e4aa

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14717624

Change-Id: I2457933b196d9683958cb2d30a2ff650c4564973