Merge "Update Chooser shadows to match Launcher." into tm-dev am: bf068a06

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/17869613



Change-Id: Ie6c9490cf6a698eaa9324e7fc0a45f2b0e51d2e2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>