am f7d2b4a2: Use fullScreenIntent to show the USB mass storage dialog.

Merge commit 'f7d2b4a2e096ae1f8ac3a2ed8b2f0e30a237f732' into gingerbread-plus-aosp

* commit 'f7d2b4a2e096ae1f8ac3a2ed8b2f0e30a237f732':
  Use fullScreenIntent to show the USB mass storage dialog.