Merge "Adjusting protection level to align with XR implementation" into main

         corresponding permission such as {@link #HEAD_TRACKING} or

         {@link #FACE_TRACKING} for the data being accessed.

         <p>Protection level: normal|appop

         <p>Protection level: signature|privileged

         @SystemApi

         @FlaggedApi(android.xr.Flags.FLAG_XR_MANIFEST_ENTRIES)

         @hide -->

    <permission android:name="android.permission.XR_TRACKING_IN_BACKGROUND"

                android:protectionLevel="normal|appop"

                android:protectionLevel="signature|privileged"

                android:description="@string/permdesc_xr_tracking_in_background"

                android:label="@string/permlab_xr_tracking_in_background"

                android:featureFlag="android.xr.xr_manifest_entries" />