resourcemanager: handle updated resources

Allow clients (in this case MediaCodec) to update the resources
on already added resources to ensure right amount of resources
are tracked by the resource manager service.

Bug: 399521069
Flags: EXEMPT bugfix
Test: atest android.media.misc.cts.ResourceManagerTest
      atest android.media.misc.cts.ResourceManagerMultiTest
      /data/nativetest64/ResourceManagerService_test/ResourceManagerService_test
      /data/nativetest64/ResourceObserverService_test/ResourceObserverService_test
Change-Id: I60d4406b2b7e0b12b691513119855049b82f012c