Adding support for listening to icon config changes am: b233058b11

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/libs/systemui/+/14429768

Change-Id: Ib628c9e6ac82b010ac41c1a9911847004ccf81e4
tree: f351c614614a7666c1360778a4590b29f555fcc0
  1. iconloaderlib/
  2. searchuilib/