Merge "Fix crashes related to unmounting when app on sdcard has an active...

Merge "Fix crashes related to unmounting when app on sdcard has an active notification in status bar. When unmounting sdcard, all the secure containers have to be unmounted first before invoking the MountService call back. We send a broadcast about disabled packages. Force a gc to clean up any stale asset references  and then unmount the containers before invoking the MountService call back." into froyo