MediaPlayerImpl: Remove duplicated function call
MediaPlayerImpl: Remove duplicated function call

InputDataSource.open() returns InputDataSource.isPrepare()
Remove unnecessary line

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