Merge "Fix audio state issue for MT IMS call" am: bc7f1814

                    // This happens when an IMS call is answered by the in-call UI. Special case

                    // that we have to deal with for some reason.

                    // VOIP calls should never invoke this mechanism, so transition directly to

                    // the sim call focus state.

                    transitionTo(mSimCallFocusState);

                    // The IMS audio routing may be via modem or via RTP stream. In case via RTP

                    // stream, the state machine should transit to mVoipCallFocusState.

                    transitionTo(args.foregroundCallIsVoip

                            ? mVoipCallFocusState : mSimCallFocusState);

                    return HANDLED;

                default:

                    // The forced focus switch commands are handled by BaseState.