SIP: fix bugs in SipAudioCallImpl

Change-Id: I671fb83221a2687de35c4f4c08e75f2065a2cd26
Bug1: startRingbackTone() is called when in-call; fix: the method should be called when *not* in-call.
Bug2: set to speaker mode when call is ended; fix: don't do this as the call audio is separate from normal media since froyo.
1 file changed