Merge "Enable and tune shadow generator." into sc-dev am: 153c35c723 am: 9dcfeaa77c

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

Change-Id: I2a4c5ac90da94de4f415bc2cb9470f7e09b9fbe4
tree: 6d0782f79371a01572eef76c86bcc280b9a24802
  1. iconloaderlib/
  2. searchuilib/