Reverse movement direction of DPAD events

The first way I had it produces somewhat unexpected behavior. If you
scroll past the top of the list, focus moves down to the control
below.

This changes it so scrolling past the bottom of the list moves focus
to the next control below.

Change-Id: I886e1854df85ceb203dac61c7f8c7daf6749e90e
1 file changed