Merge changes Ie37a2d9d,I3ed8c7d7,I6ed11be0,Idc2e1ccd

* changes:
  audiopolicy: common: add several helper function on DeviceDesc
  audiopolicy: update type convertion library
  audiopolicy: apm: connectAudioSource: use Sw brigding according to hal support
  audiopolicy: Fix sofware bridge creation for AudioHAL supporting routing APIs