gatt-service/bas_server: update API

gatt-service/bas_server: rename task

gatt-service/bas_server: extract structs for battery characteristics

gatt-service/bas_server: implement read callback

btstack.h: import battery service server

gatt-service/bas_server: multiple instances

hci_cmd: avoid calling memcpy with NULL and size = 0

a2dp: report A2DP v1.4 in sdp record

gatt-service/dis_client: fix request to send logic, fix test support

gatt-service/tx_power_service: fix characteristic properties

sdp_server: skip empty attribute lists in search search attribute response

sdp_server: validate service search pattern

sdp_server: add sdp_server_set_single_record_response

sdp_server: return invalid PDU size error

sdp_server: validate attribute id list

sdp_util: add sdp_valid_service_search_pattern

sdp_util: add sdp_attribute_list_valid

btstack_util: skip whitespace in btstack_atoi

rfcomm: avoid multiplexer use-after-free

hfp_ag: start codec negotiation only for the first audio connection

gatt-service/cycling_speed_and_cadence_service_server: track pending indications and reject new operation

Start Broadcast Audio URI profile

sdp_client: iterate over registered SDP query callbacks

avdtp: streamlinw avdtp_handle_sdp_client_query_result, only register new query if connection is waiting

avdtp: extract avdtp_get_next_connection_ready_for_sdp_query