Merge changes from topic "volume_group_apis"

* changes:
  [IMPR] AudioProductStrategy: add getName system hidden API
  fixup '[IMPR] AudioManager: add adjustAttributesVolume API'
  [IMPR] AudioService: improve bijectivity between VSS / VGS
  [BUG] AudioService: fix mute/umute of aliased streams.
  [IMPR] AudioManager: add adjustAttributesVolume API