Explicitly set default display in cutout flag

As this change explicitly sets a value that is equivalent to the default value, it should be a no-op for direct users. However, this change allows AppCompat/ MaterialComponent themes (which indirectly inherit from DeviceDefault) to have a value of default regardless of values set in DeviceDefault themes.

Bug: 286265906

Change-Id: Ia1f1dfad73f3bc8e421660948005beae71ea9a1a