Merge "Update tint for minimize button" into tm-qpr-dev am: 86564ee6ca am: 2de20bb6d7

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/20873916

Change-Id: I1f50bb86dc3af797e846b6309bda59d03d610a57
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>