[iOS][LO] Prepare rename of suggestSignalsAvailableOnResult

Prepare the rename of suggestSignalsAvailableOnResult to
hasSuggestSignalsAvailableOnResult. The first one will be removed once
the change lands in internal.

Bug: 367289075
Change-Id: Ic56c2cfbdd5e3aa665f1cf992347b3d0d01a72b2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6234254
Reviewed-by: Radu Nitescu <radunitescu@google.com>
Auto-Submit: Christian Xu <christianxu@chromium.org>
Commit-Queue: Christian Xu <christianxu@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1417370}
NOKEYCHECK=True
GitOrigin-RevId: 18dc42a199e76c71c8a19c02d66f70a0fdaa8597