Update ConnectivityCheckTargetPreparer references

Use the new ConnectivityTestTargetPreparer name instead, as the preparer
is being made more generic.

Bug: 263665773
Test: m
Merged-In: I520e92c449f366c51cda2f8b33fe9a354a8c0445
Change-Id: I520e92c449f366c51cda2f8b33fe9a354a8c0445
3 files changed