Making sure QS are visible when expanding shade with heads-up notification

QS was not visible because we were not updating QS expansion when heads up notification motion was in progress. Now we will do it when swiping down, so after going below starting movement position.

Fixes: 259447896
Test: show heads up notification -> swipe down on it -> QS should be visible throughout the whole down motion
Change-Id: Id54d7ac289fdd5bb527d9aa985e2bff90c4a4307