tilapia: enable Tethering & portable hotspot

    Wifi Tethering - works
    USB Tethering - works

    USB Tethering Depends on
    http://review.cyanogenmod.org/#/c/29170/
    http://review.cyanogenmod.org/#/c/29169/

    USB Tethering on Ubuntu - Works as it is
    USB Tethering on Windows-based PC - Requires one time installation
    of driver. Instructions to install NDIS Driver on Windows PC
    - http://goo.gl/KnnhJ

Patchset 4: Remove Bluetooth.  This doesn't work yet.  Add it later

Change-Id: Iedd2895bab08b54f41af7eaa921f29691a84364d

Conflicts:
	overlay/frameworks/base/core/res/res/values/config.xml