Respect the RESTRICT_LOCAL_NETWORK app compat flag

If the permissions required on a route include a new permission being
added for local network access, we only require the permission to be
held if the corresponding app compat flag is turned on, and we also
accept the existing NEARBY_WIFI_DEVICES permission as meeting the
requirement since it will be in the same permission group.

Bug: 386260596
Test: atest MediaRouter2HostSideTest
Flag: com.android.media.flags.enable_route_visibility_control_compat_fixes
Change-Id: I3a9bc3d1943b4c7e902e9b276e8a9c13bc1831a8