Update StorageVolumePreferenceCategory.java

don't know how to make perhaps it's no good. sorry in advance
Show "Eject card" for usb storage 
Readd the "Eject" options if the SD card is mounted via usb.
Change-Id: I802cf4d20eb3b45ce068f89c22352f79999d593e
review
Code-Review+2: Abhisek Devkota <ciwrl@cyanogenmod.com>
Verified+1: Abhisek Devkota <ciwrl@cyanogenmod.com>
Submitted-by: Abhisek Devkota <ciwrl@cyanogenmod.com>
Submitted-at: Tue, 06 May 2014 16:17:09 +0000
Reviewed-on: http://review.cyanogenmod.org/63299
Project: CyanogenMod/android_packages_apps_Settings
Branch: refs/heads/cm-11.0