Enable rndis support for USB Tethering

Change-Id: Ib18112745553ec83849450f2ab2ee0cc3d4ef0ae
Grouper: Enable USB Tethering

- Enables USB tethering to utilize device's Wi-Fi connection

Change-Id: I42f8829b608717e327af02f24bd25549554be550
grouper:  Add browser overlay for tablets

	Screenshot:  https://www.dropbox.com/s/qx4ckgjbw55zp59/Screenshot_2012-09-13-13-44-15.png

Signed-off-by: Paul Beeler <sparksco@gmail.com>