[NavCapture]: Migrate away from Find[Installed]AppWithUrlInScopes.

This is an intermediary no-op step where we switch calls to
Find[Installed]AppWithUrlInScopes over to calls to
FindBestAppWithUrlInScopes (which is what these functions do
internally).

This change is for directory:
chrome/browser/apps

Planned (but beyond the scope of this CL) is an effort to
evaluate all call sites of FindBestAppWithUrlInScopes for
correctness and introduce new helpers, that hopefully will
be more resistant to incorrect use.

Design doc: https://docs.google.com/document/d/14JPgYUVX8ECAMdXlp6GwXP-ucXnIIPXjTfxWt-WINLo/edit?usp=sharing

This CL was uploaded by git cl split.

R=skuhne@chromium.org

Bug: 379827962
Change-Id: Ic1063fb9def7335fd3011fb7668343e1fc4fcd01
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6033318
Reviewed-by: Marc Treib <treib@chromium.org>
Auto-Submit: Finnur Thorarinsson <finnur@chromium.org>
Commit-Queue: Finnur Thorarinsson <finnur@chromium.org>
Commit-Queue: Marc Treib <treib@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1385572}