[Android] Fix video can't exit full screen mode
Upstream patch https://codereview.chromium.org/292573004 has change some fullscreen video playback behavior
This change is to update XWalk with similar change to support to exit video Fullscreen
BUG=XWALK-2654
Merge pull request #2534 from js0701/fixexitfullscreenbug

[Android] Fix video can't exit full screen mode