Fix the message when Bluetooth is turning off while on the tethering menu.

Currently says "Turning Wifi off..."
This change will display "Turning Bluetooth off..." instead.

Change-Id: I741e07f3b583e8e4cfb51073fe2556f58d8a89a1
Signed-off-by: Ryan Baxter <rbryanbaxter@gmail.com>
Merge branch 'cm-10.1' of git://github.com/CyanogenMod/android_packages_apps_Settings into cm-10.1-n7