example/hfp_ag_demo: report apple accessory information

example/hfp: use create SDP record with codecs

example: use sdp_create_service_record_handle() for sdp record and assert sdp record buffer is large enough, fixes #489

example/hfp_ag_demo: support lc3-swb

examples: unify status stdout format

example/hfp_ag_demo: request master role on reconnect

example/hfp_ag_demo: add commands for initiating and establishing outgoing call

example: avoid HCI_EVENT_IS_COMMAND_COMPLETE macro

example/hfp_ag_demo: print microphone and speaker gain

example: init SM if LE supported to avoid issue with Android Cross-Transport Key-Derivation

license: update text

hfp_hf_demo: trigger hfp_hf_enhanced_voice_recognition_report_ready_for_audio on enhanced VRA activated

hfp: fix check on legacy vs. enhanced VRA activation

hfp: use full size line buffer to send enhanced VRA message

hfp: rename VRA events to match the API functions

hfp: use HFP_SUBEVENT_VOICE_RECOGNITION_ENABLED/DISABLED instead of HFP_SUBEVENT_VOICE_RECOGNITION_STATUS event

hfp_ag: merge enhanced and normal voice recognition activation

hfp: emit call answered and terminated events

hfp_ag: emit event HFP_SUBEVENT_CALL_TERMINATED before audio connection is closed

hfp_ag: simulate call connected and start ringing

hfp: fix type in event name HFP_SUBEVENT_STOP_RINGING and HFP_SUBEVENT_START_RINGING

hfp_ag: emit HFP_SUBEVENT_RING

hfp: send HFP_SUBEVENT_HF_INDICATOR event

hfp_demo: use report_status

hfp_demo: enable Echo Canceling and Noise reduction