Reduce log importance and improve logging

The first time after QS is created, there are no tiles to animate, so we
should skip logging that we cannot find each tile. This is ok.
Otherwise, warn when we cannot find a tile that should be there.

Bug: 181269159
Test: build and check log
Change-Id: I7e60ba9ce5fd8ca9dc0b1e0b5a6180249c741db4