Merge "Enable and tune shadow generator." into sc-dev am: 153c35c723

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/libs/systemui/+/14727293

Change-Id: I5619e965eecf2b0d68f8d51c6bd4c1c0c6580f2d
tree: abdf80baa4f6458c37b499819025ae7141e76f43
  1. iconloaderlib/
  2. searchuilib/