Fixed the positioning of the media panel after reinflation

Previously, the view would have a wrong translation set
since the heights weren't initialized yet. We're now
updating the height as soon as we are getting the first layout

Fixes: 156951111
Test: add media notification, click on darkmode tile, observe no shift
Change-Id: If29891ac3eaab22b97c4def726124282fd03e517
1 file changed