Fix padding in QSContainerImpl after re-inflation

Set the padding again after the fragment is recreated. As this is set
externally (by NotificationsQuickSettingsContainer), that class is
responsible of re-setting it to the latest calculated value to prevent
race conditions.

Test: manual
Test: atest NotificationsQuickSettingsContainerTest
Fixes: 282134705
Change-Id: Ic3d97e05d99148e71b9dd64f8f56c20fc68193c9