Restrict Headless system user camera access

After implementation review by Security team, recommendation
is to only allow headless system user camera access for automotive
form factor.

Bug: 317056356
Test: Build and test using KitchenSink on automotive reference platform. Not able to test CtsCameraHeadlessSystemUserTestCases on tablet form factor with lunch target cf_x86_64_tablet_hsum-trunk_staging-userdebug as the CTS test switches to User 0 for the test case and the tablet has system restriction and does not allow switch to User 0.

Change-Id: Ibfda4e4403d34e12957d2d1980fcb2936f53ec9a