Put fine eye tracking into a new permission group

Eye tracking is very sensitive data, however it also has one extremely
important use case to inform XR foveation. To communicate this unique
place in sensitivity move it into its own permission group.

FCRS_CODE: mbi7iqtfqdqwvr

Bug: 421905623
Change-Id: Ia43650e2ec98a7c04de213f7d68da371c6344b22
Flag: android.xr.xr_manifest_entries
Test: Checked that project still built.