Ensure taskbar insets for camera cutout only apply on the needed sides

For devices with a camera cutout, we only need the increased inset to
accomodate a camera cutout on the sides/orientations where the cutout
interrupts the taskbar. This change ensures that the insets are only
added when necessary.

Fix: 325508089
Test: Open an app and ensure the insets remain unchanged for 0 and 90
degree rotations. Ensure the insets for 180 and 270 degrees are still
covering the camera cutout.
Flag: N/A

Change-Id: Iba766b8a19ddce37d9ca20afb0219d679ce36ace