Update ShannonIms CERTIFICATE to PRESIGNED am: 9b3e8fd791

Original change: https://googleplex-android-review.googlesource.com/c/device/google/bluejay/+/25300808

Change-Id: Ida735edfffc84fa6066d270b8bc3dc8b69df44b3
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>