+ add timer parameter to ISipSession.make/changeCall(), + add timer paramter to SipAudioCall.make/answer/hold/continueCall()'s, + add timer parameter to SipManager.makeAudioCall(), + modify implementation in SipSessionGroup, SipAudioCallImpl accordingly, + make SipPhone to use it with 8-second timeout. http://b/issue?id=2994748 Change-Id: I661a887e5810087ddc5e2318335e2fa427f80ec6