…dates native wrapper for `SecTrust` and `SecCertificate` (#9016)

Adds support to the native wrapper to handle `SecTrust` and `SecCertificate`. 

This is a part of landing #7893 by splitting of the native wrapper implementation. 

Also fixes flutter/flutter#162938 and adds an integration test for `loadFlutterAsset`.

## Pre-Review Checklist

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

…ebViewClient`. (#8964)

This adds the SSL classes for #7893 and a few extra `WebViewClient` methods.

## Pre-Review Checklist

[^1]: Regular contributors who have demonstrated familiarity with the repository guidelines only need to comment if the PR is not auto-exempted by repo tooling.

Currently xcode-analyze relies on the native project files already having been generated. This is unreliably locally, and now is problematic on CI as well since Xcode builds now (as of flutter/flutter#165916) must match the last build mode, so analysis will fail if the previous CI step built in release mode (as is currently the case).

This adds a config-only build call in debug mode before analyzing. Since running a config-only build is a common operation in the tool, this extracts a helper to abstract the logic.

Unblocks the flutter/flutter->flutter/packages roller.

#8618)

Also Fixes flutter/flutter#164132 by passing a `TestInstanceManager` when needed.