[automerger skipped] Move IMS tests back to opt/net/ims for better organization am: f4763fd5 am: eaa42fa9 am: 83553c8d -s ours

am skip reason: Change-Id I6e74cad49a8010867dd78edf26c6526f872dd141 with SHA-1 e1fc08be is in history

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/opt/net/ims/+/12403388

Change-Id: If1cc07aa20c0a24dad662d815165cad65c09ce8d