Merge "Ignore nav bar alpha changes while user is not yet setup" into...

Merge "Ignore nav bar alpha changes while user is not yet setup" into rvc-qpr-dev am: 607893c9 am: 21c2ee66

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12336146

Change-Id: Ibcd4887b93df1a28a574c89e742970900420afc7