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>
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Change-Id: I0882b4bb296af041ec5766ff29a605554f13b0a7