背景：由于没有听筒，所以直接在电话状态下只有免提模式；
修改记录：
qssi/packages/services/Telecomm/src/com/android/server/telecom/CallAudioRouteStateMachine.javaprivate void createStates(int earpieceControl) {switch (earpieceControl) {case EARPIECE_FORCE_DISABLED:mDoesDeviceSupportEarpieceRoute = false;break;case EARPIECE_FORCE_ENABLED:mDoesDeviceSupportEarpieceRoute = false;//modifiedbreak;default:mDoesDeviceSupportEarpieceRoute = false;//checkForEarpieceSupport();//modified}addState(mActiveEarpieceRoute);addState(mActiveHeadsetRoute);addState(mActiveBluetoothRoute);addState(mActiveSpeakerRoute);addState(mRingingBluetoothRoute);addState(mQuiescentEarpieceRoute);addState(mQuiescentHeadsetRoute);addState(mQuiescentBluetoothRoute);addState(mQuiescentSpeakerRoute);mStateNameToRouteCode = new HashMap<>(8);mStateNameToRouteCode.put(mQuiescentEarpieceRoute.getName(), ROUTE_EARPIECE);mStateNameToRouteCode.put(mQuiescentBluetoothRoute.getName(), ROUTE_BLUETOOTH);mStateNameToRouteCode.put(mQuiescentHeadsetRoute.getName(), ROUTE_WIRED_HEADSET);mStateNameToRouteCode.put(mQuiescentSpeakerRoute.getName(), ROUTE_SPEAKER);mStateNameToRouteCode.put(mRingingBluetoothRoute.getName(), ROUTE_BLUETOOTH);mStateNameToRouteCode.put(mActiveEarpieceRoute.getName(), ROUTE_EARPIECE);mStateNameToRouteCode.put(mActiveBluetoothRoute.getName(), ROUTE_BLUETOOTH);mStateNameToRouteCode.put(mActiveHeadsetRoute.getName(), ROUTE_WIRED_HEADSET);mStateNameToRouteCode.put(mActiveSpeakerRoute.getName(), ROUTE_SPEAKER);mRouteCodeToQuiescentState = new HashMap<>(4);mRouteCodeToQuiescentState.put(ROUTE_EARPIECE, mQuiescentEarpieceRoute);mRouteCodeToQuiescentState.put(ROUTE_BLUETOOTH, mQuiescentBluetoothRoute);mRouteCodeToQuiescentState.put(ROUTE_SPEAKER, mQuiescentSpeakerRoute);mRouteCodeToQuiescentState.put(ROUTE_WIRED_HEADSET, mQuiescentHeadsetRoute);}之后验证来电/通话只有免提模式，点击免提按钮也是不能切换的；
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