Introduce ACTION_BUTTON_PRESS and ACTION_BUTTON_RELEASE as actions to
signal a button press or release. If these actions happen
simulanteously with a DOWN or UP event then they're explicitly
ordered to happen after the DOWN or preceding the UP in order to send
them to the most recently targeted view.
Also, introduce new stylus button constants that differ from the
constants we use for mouse buttons.
Bug: 20704355
Change-Id: Ib960a5004db5429ad2fc8db020704773e2978327
Native doesn't ever actually care about the attributes of keys, so
move all of it up into the managed layer and move all of the key
names down so they're defined once.
Change-Id: Ic8ded13ce050b2b98744735ff50d11e8d882d7d5
Enhanced the input system to support concurrent dispatch of touch
events on multiple displays which is required for this to work.
Add method to apply offset to PointerCoords.
Change-Id: I55fe4a9a8785ae5a2d3341d214fa3c5107f3963a
