1. Fix high beacon and broadcast packets loss ratio of WiFi to
make MDNS test pass.
2. Improve stability of WiFi performance with a little sacrifice
of throughput.
3. Improve BLE advertising and connection performance with
dynamic priority. It sacrifices a little WiFi throughput, but
achieves balance between WiFi and Bluetooth.
1.Bugfix btdm sleep twice after wakeup request
2.Set the minimum encryption key size to be 7 octects for BR/EDR link for preventing KNOB attack
This patch is to address the CVE-2019-9506 vulnerability.
