Merge "Add key layout and device file for Reference RCU" am: 9d396145ef am: eb20fced3d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1521837

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I9558def867e5a0566b2e211c4e71c4aeb1589c7c