Upgrade robolectric to /external/robolectric to prep for removal of /external/robolectric shadows. am: 1566c28a4b am: d84863e458 am: 6706245ef7 am: 3e4e540f10

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Car/Cluster/+/21738368

Change-Id: Iab59151c28ef3f4fdf07dbae74ba0e822a75e580
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
tree: 21acad954e1523f152a355d5f6a7650fb119341e
  1. ClusterHomeSample/
  2. ClusterOsDouble/
  3. DirectRenderingCluster/