Updating taskbar icon alignment state

Icon alignment is only tied to Launcher paused/resumed state
Creating two separate states for this:
  1) Launcher paused/resumed
  2) Active gesture interaction (live-titles can affect paused state)

Removing state handler dependency on taskbar visibility

Bug: 190170303
Bug: 187353581
Bug: 187919439

Test: Manual
Change-Id: Ia97cdf43cec1d9213f5dc2af8d66258b34c57514