Merge "Allow status bar to be transparent, and clear LIGHT flags." into rvc-dev am: 25602430fd am: 01b7ac20a2

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/12166023

Change-Id: I1b994f70622e3e8da3e225fe8e7aadb6bbf340a0