Fix clipping coordinates on RTL

In RTL in landscape, the container for QS and footer was clipping
incorrectly, as it should use its coordinates (not its parent's) for
clipping its children.

Test: manual
Test: atest QSPanelTest, test that views are visible to user
Fixes: 235422445
Change-Id: Idf29a3f17128591eaa3405058ae16d5b09a51f43