Add DrawerLayout and ViewDragHelper classes found in the new support library.  These classes have been modified to work with the current framework and no need for any support or compat classes.

Change-Id: Ib57f37fadd5c01efef3188b8e2b906444d870fbf
Merge "Add DrawerLayout and ViewDragHelper classes found in the new support library.  These classes have been modified to work with the current framework and no need for any support or compat classes." into jb-mr2