Switch the framework AIDL to use AudioDeviceDescription

'AudioDeviceDescription' is a new type that will be used
both by HAL and framework interfaces. This CL changes the
framework interfaces to use it instead of 'int' type
which was used to pass legacy 'audio_devices_t' transparently
via the AIDL layer.

Bug: 188932434
Test: check audio on device
Change-Id: Ie275ea82db89011c855ac21f0af4f6546ceb2d13