ImagePicker needs WRITE_EXTERNAL_STORAGE permission.

On some devices this permission is required to write the sdcard.

Change-Id: I50d2eb4a8b89cf08701ccd29c4f6582f032ab72c
Fixed the Twitter component to work with Camera.

Didn't before, seemed like Camera outputs a filepath
that begins with file:// while ImagePicker does not.

i.e, Camera -> file:///storage/0/emulated/foo.jpg
     ImagePicker -> /storage/0/emulated/bar.jpg

Change-Id: Ia43ba9b22fbfdbf5205aa86122f43c19b25f2d67