btstack_defines: add AVRCP_SUBEVENT_ADD_TO_NOW_PLAYING event

avrcp_target: rename function

avrcp_target: implement response to PLAY ITEM

btstack_defines: add AVRCP_SUBEVENT_PLAY_ITEM event

avrcp_browsing_target: fixh change path response

avrcp_browsing_target: fix get folder items

avrcp_browsing_target: store cmd params in connection

avrcp_browsing_controller: rename field

avrcp_target: implement UIDS changed

avrcp_browsing_target: implement get_item_attributes

btstack_defines: add GET_ITEM_ATTRIBUTES event

avrcp: rename enum item

avrcp_browsing_target: implement change path

btstack_defines: add AVRCP change path event

avrcp: move definitions

avrcp_browsing_target: extend get_folder_items_response function params

avrcp_browsing_target: fix set browsed player

avrcp_controller: add comments

avrcp_target: send now playing item id in INTERIM response if available

btstack_defines: add params to GET_FOLDER_ITEMS event

avrcp_browsing_target: extend GET_FOLDER_ITEMS event

avrcp_browsing_target: check input data length for SET BROWSED PLAYER command

avrcp_browsing_target: fix response length for SET BROWSED PLAYER command

avrcp_target: send response 2 for invalid Set Absolute Volume parameter

avrcp: query player application settings