Issue title: Dead end on duplicate stream updates
 Issue body: When trying to publish the exact same text with stream.publish an error dialog is shown that says "This status update is identical to the previous one".  This is correct behavior so far.

However, there is an "Okay" button at the bottom of the dialog that does not seem to do anything.  It neither dismisses the dialog, nor does it go back to the form so that the user can edit their update.  Either of those two alternatives would be ok, but currently it just does nothing.  So the user has to figure out that the back button must be pressed in order to dismiss the dialog.

 Comments: 
 Comment 0: This issue was raised against a previous version of the Facebook SDK for Android.

In 2012, the SDK had a significant rewrite and relaunch, and we are closing issues and pull requests that predate that v3.0 release.

If you are still experiencing this issue, please raise a new issue with repro steps in the supported SDK (currently v3.6). For more information, please see our Android developer center at https://developers.facebook.com/docs/android

Many thanks for using the Facebook Platform, and your support of this project.

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