AndroidStorageProvider: Add compatibilty with fuse daemon mounted storage

* Also show all available mounted storage options when selecting 'External Storage' while browsing, instead of /storage/sdcard0/ which getExternalStorage() returns.

Signed-off-by: Brandon McAnsh <brandonm@matricom.net>
Left it separate due to the conditions. Although somewhat similar, one is ignoring non-removable drives and the new check is removing fuse daemon mountpoints.