Updater: fix broken updater tests.

The IPC dialing has to use the same-version launcher in the
UpdateServiceInternal case.

Change-Id: I0c81a03d983d5d6e1f5815fda6834f6fa59c09cf
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4566686


Commit-Queue: Xiaoling Bao <xiaolingbao@chromium.org>
Commit-Queue: Joshua Pawlicki <waffles@chromium.org>
Reviewed-by: Xiaoling Bao <xiaolingbao@chromium.org>
Code-Coverage: Findit <findit-for-me@appspot.gserviceaccount.com>
Cr-Commit-Position: refs/heads/main@{#1149377}