audio/audio_manager: Refactor duplicated code
audio/audio_manager: Refactor duplicated code

- Extract pause_audio_stream method

jeongchanKim/TizenRT,an4967/TizenRT,junmin-kim/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,sunghan-chang/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,jsdosa/TizenRT,chanijjani/TizenRT,chanijjani/TizenRT,pillip8282/TizenRT,jeongarmy/TizenRT,jeongarmy/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,pillip8282/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,junmin-kim/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,jsdosa/TizenRT,junmin-kim/TizenRT,jeongarmy/TizenRT,pillip8282/TizenRT,davidfather/TizenRT,jeongarmy/TizenRT,chanijjani/TizenRT,chanijjani/TizenRT,davidfather/TizenRT,davidfather/TizenRT,junmin-kim/TizenRT,pillip8282/TizenRT,jeongchanKim/TizenRT,an4967/TizenRT,Samsung/TizenRT,davidfather/TizenRT,junmin-kim/TizenRT,sunghan-chang/TizenRT,an4967/TizenRT,junmin-kim/TizenRT,sunghan-chang/TizenRT,chanijjani/TizenRT,sunghan-chang/TizenRT,chanijjani/TizenRT,sunghan-chang/TizenRT,chanijjani/TizenRT,jeongchanKim/TizenRT,davidfather/TizenRT,jeongchanKim/TizenRT,an4967/TizenRT,sunghan-chang/TizenRT,jsdosa/TizenRT,davidfather/TizenRT,an4967/TizenRT,jeongchanKim/TizenRT,Samsung/TizenRT,jeongarmy/TizenRT,davidfather/TizenRT,pillip8282/TizenRT,jsdosa/TizenRT,jsdosa/TizenRT,jsdosa/TizenRT,Samsung/TizenRT,sunghan-chang/TizenRT,jeongchanKim/TizenRT,jsdosa/TizenRT