Stylus support: creating and setting listeners for stylus button press

This updates almost(*) all locations that use a long press listener to
also set a custom touch listener that recognizes the stylus button press
action.

The stylus button press action is: when a stylus touches a view while the
primary stylus button is pressed which may occur on a DOWN or MOVE event.

*The location this is *not* enabled for is: Longpress to enter "overview"
mode -- this isn't really a selection or drag n drop action; it is also
easy to accidentally do this while using the stylus gesture to drag n drop
items which is not an ideal interaction. Also not set for the "cling" that
demonstrates this.

Bug: 20430722
Change-Id: I9343f143261a7b4fada9afca28b8a11a60dbecca