Merge changes from topic "qualification-hfp"

* changes:
  floss: telephony: Support for SCO manipulate
  floss: telephony: Support hold call operations
  floss: telephony: Support dialing operations from HF
  floss: telephony: Implemented basic phone operations
  floss: media: Store call status and handle CLCC in stack
  floss: media: Add set device status support
  topshim: hfp: Respond to AT+CNUM query