Error corrections / new IDF 5 events

• Activate SPP (Serial protocol) only on request
• Fix set_volume being pure on A2DPNoVolumeControl; Added missing overrides
• Prefer get_peer_name() over get_connected_source_name() for A2DPSink
• Correct bug in set_local_name() for A2DPSource
• Correct compile error in bt_music_sender_disconnect.ino example
• Provide get_name() to both A2DPSink and A2DPSource
• Added Serial.begin() to bt_music_sender_disconnect.ino example
• New BluetoothA2DPSource example: status callback
• BluetoothA2DPSource add lost process_user_state_callbacks
• BluetoothA2DPSource: Unhandled events change from from Error to Warning
• Provide compile option A2DP_I2S_SUPPORT to deactivate I2S
• Prefer get_peer_name() over get_connected_source_name()
• Adding option to specify device name with set_local_name()
• Support for new IDF 5 events
• Prevent compile error for ESP_BT_GAP_ACL_CONN_CMPL_STAT_EVT before idf 4.4.4
• Changed the default setting, so that there is not automatic reconnect!