Merge "add uievent logs for nav buttons" into rvc-dev am: a15a870d am: 02807bfa am: f1131e3f

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

Change-Id: Icd1009c51d06dd45272d82101fbb7f758bd37e5d