Merge "add uievent logs for nav buttons" into rvc-dev am: a15a870d am: a21df49f am: fbcb15d0 am: 7e06bfc9

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11758280

Change-Id: I74859a8697b77d7b6590590349ab73418b8d096e