Merge "Improve launcher loading times." into sc-v2-dev am: e48d931740

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/libs/systemui/+/15616234

Change-Id: I2b4a8e22c335e893cdd7fe5f4653935b5b06e696
tree: d35624b3b61a3d64f7b49492b46756accb307b0b
  1. iconloaderlib/
  2. searchuilib/