Update light reveal effect on wake/sleep so that the screen off animation works too.

Screen off starts while we aren't yet dozing, so use wake/sleep instead.

Bug: 181923218
Test: use power button and lift to wake and sleep device
Test: use fingerprint, verify circle reveal still works
Change-Id: I52f6244609c6c0c15b4787ecd3e69b19c92bc106