Android manifest: Add intent filter for MediaShareActivity - respond to send action intents with image data
MediaShareActivity: Add code to retrieve image Uri from intent
FacebookAccountLoginActivity: Tell fbLoginFragment to request publish permissions on log in
Layouts: Rename main.xml to fb_account_login_layout.xml
Create new layout for MediaShareActivity, to display list of photos that will be uploaded
MediaShareActivity: Use media_share_activity_layout.xml as main layout