SHARE activities would not be imported from federated instances for local notices

SHARE activities would not be imported from federated instances for local notices

"[...] posts _local_ users (like you) make won't get data about "repeated by"
from federated users"

This was because the ActivityObject would processShare where the shared object
has a _local_ 'actor' URI. Ostatus_profile would complain this meant that a
"Local user cannot be referenced as remote.".

So we see if the shared activity object's id (URI) is in our Notice table, so
we don't have to processActivity - and can skip ensureActivityObjectProfile.