Reduce paddings in landscape mode

On orientation change, the paddings are not
automatically updated. We re-set them manually,
because requestLayout() or invalidate() did not solve this.

Also properly updates the empty state icon visibility
(as in some cases it was still showing in landscape on config
change).

Test: manual
Test: atest ResolverActivityTest
Test: atest ChooserActivityTest
Fixes: 149817494
Change-Id: I2d6ff1078ee834fa50aa47ede7641f6359c267de