TODO: #1
Description
1.HCI host -> controller flow control
2.HCI controller -> host flow control
3.RFCOMM C/R bit的理清
4. BT_STOP内存回收
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1.HCI host -> controller flow control
2.HCI controller -> host flow control
3.RFCOMM C/R bit的理清
4. BT_STOP内存回收