MediaShareActivity: Set the continue button's OnClickListener in code instead of in the layout. Allows the uploadMedia method to be made private, rather than making it publically accessible.
MediaShareActivity.uploadMedia: Remove parameter view - unneeded
MediaShareActivity: Whitespace formatting changes
NoActiveSessionDialogFragment: Make dialog message shorter and simpler
NoActiveSessionDialogFragment: In dialog message, say 'photos and videos' instead of 'media'
MediaShareActivity: Rename imageData to mediaUri - better name
MediaShareActivity.uploadMedia: Add parameter mediaUri, and update code that calls this method
MediaShareActivity.uploadMedia: Remove Toast notification within try-catch for FileNotFoundException, and add TODO about notifying user
MediaShareActivity: Instead of calling Activity.finish in uploadMedia, call the method in the OnClickListener for the continue button
MediaShareActivity: Add TODO about notifying user whether upload is successful or not
MediaShareActivity.getFileForImageURI: Rename parameter imageUri to mediaUri
MediaShareActivity: Add TODO for uploadMedia
MediaShareActivity: Rename uploadMedia to uploadImage
MediaShareActivity: Move code for cheking Facebook account status to a new method - checkFacebookAccountStatus
MediaShareActivity: Check Facebook account status during creation of activity, to prevent unnecessary work
MediaShareActivity.checkFacebookAccountStatus: Add proper javadoc