New 'AppWidget' ADT Template.

This change adds an AppWidget template into the 'other' category
that creates helper classes and xml for an AppWidget. The template
supports setting minimum size, resizable, configuration and
home-screen/keyguard options.
Signed-off-by: Rich Hyndman <rhyndman@google.com>

Change-Id: Ic349b0adf10f8814af6d04b62654592cbeb89c09
77 files changed