HFP: Ignore CS non-call state update when virtual call start

Sometimes no SCO audio output from DUT or remote HS until BT is reset
if we turn off/on HS continually.
The cause is when SLC is up BT service will inquiry current CS phone state,
however idle CS phone state update will terminate virtual call
and virtual call state always keep in opening state.
This change ignore CS non-call state update when virtual call already start.

Change-Id: If2e354ee2bce37f299a2cc14b966245c509ea252
CRs-Fixed: 2310050
1 file changed