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

This reverts commit f02a48ce11b1371f328613f4461c43d3ed6bdac9.

Conflicts:
	core/res/res/values/cm_strings.xml
	core/res/res/values/symbols.xml

(cherry picked from commit 6363fe434b8e7b8f3452bef2d526d79e22319bb4)
frameworks: add persistent notification when USB OTG is connected

Tapping the notification will take the user into Storage settings, and
highlight the 'Unmount' option.

Change-Id: I650f3874a8295b2b8ffdaef78aff4b68e9cd574e
Signed-off-by: Roman Birg <roman@cyngn.com>

Conflicts:
	core/res/res/values/symbols.xml

(cherry picked from commit 89e080099bf15f97f907acbffbc9e6c143e815a8)