Fix one NPE in tethering setting

Once we not declare BT feature, go Setting->more->tethering
will trigger this NPE.

Change-Id: I4736e7bade261475acda74e26250a81452018ffa
Signed-off-by: Jianzheng Zhou <jianzheng.zhou@freescale.com>
Merge tag 'android-4.3_r1.1' into jb43

Android 4.3 release 1.1

Signed-off-by: Evan Anderson <evan1124@gmail.com>

Conflicts:
	res/values-es/strings.xml
	res/values-it/strings.xml
	res/values-nl/strings.xml
	res/values-pt/strings.xml
	res/values-sw/strings.xml

Change-Id: I585e205382fbfd9815bed43f7faea7e754129c10