1. Use bt_app_gap_init function
2. Add Security Simple Pair doc
3. Update README
Update SPP demo
1. Add input module for bt_spp_initiator demo to show the security simple pair features
2. Update README of bt_spp_acceptor and bt_spp_initiator demo.
Format comment in esp_a2dp_api.h
Format comment in esp_avrc_api.h
Format comment in esp_spp_api.h
Fix bt_discovery build err
Update HFP API guide error
Remove BTA_AV_DEBUG
Remove Trailing Whitespace & End of Files
1. Improve WiFi throughput in some Classic BT scienarios(idle, inquire scan,
connected, sniff, a2dp pause, etc).
2. Support WiFi + Classic BT + BLE mesh coexistence scienario.
3. Improve WiFi scan and connect succeed ratio in coexistence scienario.
4. Do not support to choose software coexistence preference anymore for it is
determined according to coexistence scienario automatically.
components/lwip: increase TCP send buffer and receive window limitation when TCP window scale is enabled
components/ble_mesh: Fix some bugs about ble mesh
1. fix send acl pkt after ble have sent terminate ind modify min adv interval to 10ms.
