Use actual storage type of sdcard/usb (1/2).

Change-Id: Icaf0d246ab3bdd0614c8bb7a22f8b2b95cbe9c7e
TODO: Provide drawable for usb storage (someone please).

Conflicts:
	core/res/res/values/cm_strings.xml
squashed: revert DocumentsUI changes

Revert "Fix DocumentsUI FC"

This reverts commit cd48d8b3d713eff1e1f986228b55b79f51be2487.

Revert "DocumentsUI: Handle NPE gracefully"

This reverts commit 8ba53655cf460690a80c6988baced9ad9bcd6322.

Revert "DocumentsUI: Remove catch-all statements"

This reverts commit 13a67f83ae8db62575461956a5507f1a33d7391d.

Change-Id: I1365d1be4c017b2b65e31b8dba46ce6ee6b1226d
DocumentsUI: fix recursive delete

Create one DirectoryLoader in UI thread to use for delete

Change-Id: I83a5811f152090f7812ad58ff4ee3bc13748d158
Revert "Implement DocumentsProvider.createDocument and deleteDocument"

The original commit breaks the public API and causes crashes when
deleting certain items in DocumentsUI

This reverts commit f6bfaee6ad7ccd4491609d5df606558a4ae30f72.

Change-Id: I5a433148548e7a1a997ee50e5938f7a4cb4c5ade
DocumentsUI: Workaround for aapt warnings

* Now we should be completely free of aapt warnings

Change-Id: I8e6886f9ac93adb19c80887a1b7329ae9b942125