GitLab

Update cast_runner to delay connections for bindings and rewrite rules
until after the AppConfig is returned. This AppConfig will now contain
the agent_url, which will be used to contact the correct agent for
bindings, etc.

Bug: b/141573972
Test: cast_runner_integration_tests, Launch application

Change-Id: Ida6966fba6039fc2f9ea9d7c136711d13a0a5a2a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1895401Reviewed-by: Wez <wez@chromium.org>
Commit-Queue: Connor Lange <connorl@chromium.org>
Auto-Submit: Connor Lange <connorl@chromium.org>
Cr-Commit-Position: refs/heads/master@{#722625}