examples/a2dp: fir SDP record ID< and AVRCP supported features flags

exmaple/a2dp: improve example annotation

a2dp_source/sink_demo: drop avrcip_cid check

avrcp: use separate callback for avrcp open/close connection events

avrcp: replace avrcp_target/controller_connect/disconnect with avrcp_connect/disconnect

avrcp: call avrcp_init explicitly

ad2p_demo: document URL to blog post

a2dp_source_demo: request role change on reconnecting headset to always use them in slave mode

avdtp: clean up logs

a2dp_source: add consol log for a2dp stream events

a2dp_source_demo: reconfigure hxcmod on new sampling frequency

a2dp_source: fix event type in a2dp_signaling_emit_delay_report, forward AVDTP_SUBEVENT_SIGNALING_CAPABILITIES_DONE event

avdtp source: Adapt Bluetooth spec SBC configuration definition to the expected input of SBC Encoder

avdtp: forward A2DP_SUBEVENT_SIGNALING_DELAY_REPORT as event to client app; change a2dp sink return value of a2dp_sink_create_stream_endpoint from status to stream endpoint

Use BTSTACK_FILE__ without __ prefix (MISRAC2012-Rule-21.1)

a2dp_demo: fix supported features

a2dp demo: cleanup printfs

a2dp taret demo: add volume control

avrcp: remove browsing flag from create SDP record as it is pat of supported features

a2dp_source: suppport stream reconfiguration (a2dp_source_reconfigure_stream_sampling_frequency)

example: register for events after setting up the stack, register for hci events after sm_init()

a2dp_source: a2dp_source_create_stream_endpoint returns avdtp_stream_endpoint_t

a2dp source: fix compile

a2dp source demo: put avrcp cid into meadi tracker, correct STDIN out info

a2dp source demo: add cmd to printfs