fixup! Update the cutout side override doc to encourage all side override

Original change changed the resource array type for primary display, but left the secondary display resource as a string array. This causes DisplayCutout#getDisplayCutoutSideOverrides() to fail as it's trying to read the resource as an int array.

Change-Id: I77a084cd0de953f595984290d4ff3bbbdff3d9d8