resourcemanager: map right codec type for metrics

ResourceSubType defined by the resource manager is correctly
mapped into media_metrics codec type using a function.

Bug: 324297311
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: Ia2e1afaa3a7c0c1fd4b6d17550dc49472779a3f4