Exempt APP_STREAMING role holders from screenshare protections

Allow holders of the COMPANION_DEVICE_APP_STREAMING role to capture
sensitive content. This makes screenshare protections not apply to apps
holding this role.

Bug: 385106290
Test: unit tests
Flag: EXEMPT bugfix
Change-Id: Iaa7fef816b6a61bc726f0c9bba983d15e77049cb