Over scroll effects [2/2]

Change-Id: I68da4183fe3c667059be9cf352723ffad4ef6103
User defined wifi/usb tether network. [2/2]

Enables users to select from a list of predefined networks
for use as the tether network, overriding the built-in networks.
This is useful, for example, where OpenVPN is in use with
routed setup.

Change-Id: I0dce2379a3f85fc63e8140e0e8c9c4c8889c5ae2
tether network: fixed use system default.

Change-Id: I4cd159b6b375d6b9b4b8f61bd70b23851753a713