Merge "Make the header INVISIBLE when alpha is 0" into tm-qpr-dev am: 84861549 am: e82d4727

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20873142



Change-Id: Ieadbe03c60cb7e06d420df8028315d1088ef9a20
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>