issue #4867:Use system widget to play video on Android
issue #4868:Use system widget to play video on iOS
issue #4870:Add a ui widget of playing video
issue #4876:Add test case to play video
Update XCode project.pbxproj for add files related to VideoWidget.
Merge pull request #6555 from Dhilan007/v3_video

issue #4859:Add a widget to play video