Update to /external/robolectric rather than older /external/robolectric-shadows also required legacy looper mode. am: 469770f24a am: d71e437158

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/StorageManager/+/22155834

Change-Id: I5a40e8f7a2f298c17a7ca91911bcf3856ebfc58f
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>