Merge "Null-check the desaturating view, it might be gone." into rvc-dev am:...

Merge "Null-check the desaturating view, it might be gone." into rvc-dev am: b19c92dc am: b40378b0 am: dccd5b13 am: 22b057a0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/11708789

Change-Id: I451f03f85f1af5476945741802e11130a964beb4