Bug 942199: Allow minimum EXIF preview size to be configured at build time for Camera and Gallery
(cherry picked from commit e439f8630fdea790595efaebab24ec21be6bc0e4)

Conflicts:

	apps/camera/js/filmstrip.js
Merge pull request #16063 from davidflanagan/bug942199

Bug 942199: Allow minimum EXIF preview size to be configured at build ti...