AudioManager: Add communication device management APIs

Add new APIs to manage the audio device used for communication
use cases (Cellular calls, VoIP and Video calls).
These APIs are meant to replace specific APIs like setSpeakerPhoneOn()
and provide a single generic way of configuring the audio device selected
for calls.
They will be used for newly added device types (e.g. BLE audio) instead
of adding new specific APIs.
They will also offer more options like for instance allowing to select the
earpiece (handset) device when a wired headset is connected.
The new APIs are:
 - boolean setDeviceForCommunication(AudioDeviceInfo)
 - void clearDeviceForCommunication()
 - AudioDeviceInfo getDeviceForCommunication()

A listener is also added for applications to monitor current communication
device selection:
- OnCommunicationDeviceChangedListener
As well as listener registration and unregistration APIs:
- addOnCommunicationDeviceChangedListener()
- removeOnCommunicationDeviceChangedListener()

Bug: 161358428
Test: make && atest AudioCommunicationDeviceTest
Change-Id: I8028d842e4a8ca1abe0f87d03e3c5d57c46b9362