Merge pull request #13738 from huchengtw-moz/camera/Bug_939047_black_bor...

...der_on_left_side

Bug 939047 - [B2G][Helix][camera][dingyu]The camera preview is not corre..., r=djf(cherry picked from commit 16682523182fa4d047b3ffb63059dd45732078ee)