am e1d2fb17: Fix playback of email attachments (http://b/issue?id=3066732), don\'t forget to close the cursor, and don\'t crash when somebody launches AudioPreview without a URI.

Merge commit 'e1d2fb1745f10c9206e8972f783273866b3df1dc' into gingerbread-plus-aosp

* commit 'e1d2fb1745f10c9206e8972f783273866b3df1dc':
  Fix playback of email attachments (http://b/issue?id=3066732), don't forget