Revert "Animates AbsSeekBar progress movement from key presses."

Incorrect implementation that broke the Brightness dialog slider. Reverting
to the previous behavior.

This reverts commit c5c9d0af764f590ae0031b5470192a0a08ca42d1.

BUG: 18510040
Change-Id: I201b1da46be964fcf6f041bb92ef79c335c2d23d
3 files changed