[automerger skipped] Revert "Use mockito-core 4.6.1 for Robolectric prebuilt" am: 9ca2897884 -s ours

am skip reason: Merged-In I343938b4e60d0fb05e00c62e20270257ccb1f3d9 with SHA-1 4c9cc9c1d3 is already in history. Merged-In was found from reverted change.

Reverted change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/tools/+/20750636

Original change: https://googleplex-android-review.googlesource.com/c/platform/prebuilts/tools/+/20878391

Change-Id: I62ca79337bf2b22c4a30b36d3b6a88959d24514b
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>