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: I1eb3bc2f3d4bb924aa85e31b654981544129ede3
tree: f351c614614a7666c1360778a4590b29f555fcc0
  1. iconloaderlib/
  2. searchuilib/