Add new field 'pcmStreamId' in LeAudioBroadcastConfiguration

This field is used to indicate the PCM stream source for given stream
handle

Tag: #feature
Bug: 264692800
Test: m android.hardware.bluetooth.audio-update-api
Change-Id: I3df9066e98ca552329bb58ae5fbc5346d1021b10
Merged-In: I3df9066e98ca552329bb58ae5fbc5346d1021b10