Move common audio AIDL types to audio.media.audio.common

The following types are being moved from 'android.media':
 - AudioChannelLayout
 - AudioFormatDescription
 - AudioFormatType
 - PcmType

AudioChannelLayout replaces legacy-based AudioChannelMask type.
AudioFormatDescription replaces legacy-based AudioFormat type.
Updated conversion functions.

Bug: 188932434
Test: atest AidlConversionUnitTests
Test: atest SoundHw2CompatTest
Test: atest SoundTriggerMiddlewareImplTest
Change-Id: Id002177f6b7f651389b59b0f476e6e2d28be4592