SnapdragonCamera: Add the real image size to media provider db

The image size may change after add the jpeg exif header. If the real
file size was not match the _size column in media provider database,
the picture will not be opened on PC via MTP mode.

Get the real file size after add exif, and save it into provider db.

Change-Id: I832d24f4e38e0fd2e2f0fa536bb94927c4ab442a
CRS-Fixed: 854308
1 file changed