Enable new_robolectric am: 9c6e3515f6

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/misc/+/20413093

Change-Id: I30c8ef8e723cb0d71eabe7b172501e77e00496a5
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>