Update BT HFP call state to audio manager #2801
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As we are using btusb loopback device, there is no audio output if we open btusb card during DIALING/RINGING call state.
Audio is routed properly when btusb loopback device is opened after call is picked up (i.e., call state to ACTIVE).
We are updating this call state to audio manager, so that audio manager can open/close the btusb loopback device.
Voice call verified.
Tracked-On: