Only apply rounded-corner animation on TYPE_BUILT_IN displays

Device manufacturers might only know the corner radius of their
devices, but cannot predict which display would be connected later
while configuring rounded_corner_radius. Also, a device might have
multiple built-in displays, so we apply rounded-corner animation on
all built-in displays.

Bug: 131040127
Test: Follow the reproduction steps in the bug.
Change-Id: If7865537aeebc70ac94a095ffdf4c8e2cdc11b50