Implement VUR in SubscriptionManager.

SubscriptionManager combines the enableVUR option for all the VHAL
clients and sends the request to IVehicleHardware. If some of
the clients enables VUR while others disable VUR, SubscriptionManager
will apply filtering for the clients that enable it.

Test: atest DefaultVehicleHalTest
Bug: 306748801
Change-Id: I1a375ab2c00c7f37e432ed039818367dd0465b19