Port 3P token API to app-check-exp

[hsubox76]

Porting 3P token APIs that were added to v8 (non-modular) API in #5033

Also added some test reliability improvements.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 43c5c6d

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[google-oss-bot]

Binary Size Report

Affected SDKs

No changes between base commit (3ea1e1f) and head commit (544dbf0).

Test Logs

• Base (3ea1e1ff): https://github.com/firebase/firebase-js-sdk/actions/runs/969162212
• Head (544dbf05): https://github.com/firebase/firebase-js-sdk/actions/runs/969360666

[google-oss-bot]

Size Analysis Report

Affected Products

Diffs between base commit (1e6bd3e) and head commit (7cb510b) are too large (243,158 characters) to display.

Please check below links to see details from the original test log.

Test Logs

• Base (1e6bd3e): https://github.com/firebase/firebase-js-sdk/actions/runs/972953486
• Head (7cb510b): https://github.com/firebase/firebase-js-sdk/actions/runs/987840513

[Feiyang1]

It is not correct for 3p listeners - If there is no error handler, the error should just be ignored.

Do we handle both 2p and 3p listeners in this function? If so, they need to be handled differently, where 2p listeners always get the token regardless of the error state, and 3p listeners get a real token in the success handler, and errors in error handler and errors should be ignored if there is no error handler.

That also means we need a way to tell 2p and 3p listeners apart.

[Feiyang1]

I probably missed it in the PR for v8, but we need to do the same in v8 too.

[hsubox76]

I added a type property to the observers. Let me know if it works, and if the names are ok.

[github-actions]

Changeset File Check ⚠️

• Changeset formatting error in following file:

  Package "firebase-compat-typings-test" must depend on the current version of "firebase-exp": "9.0.0-beta.5" vs "file:../../packages-exp/firebase-exp"
  Package "firebase-compat-typings-test" must depend on the current version of "firebase-exp": "9.0.0-beta.5" vs "file:../../packages-exp/firebase-exp"
  Package "firebase-compat-typings-test" must depend on the current version of "firebase-exp": "9.0.0-beta.5" vs "file:../../packages-exp/firebase-exp"
  Error: Failed to find where HEAD diverged from master. Does master exist?
      at async getChangedFilesSince (/home/runner/work/firebase-js-sdk/firebase-js-sdk/node_modules/@changesets/git/dist/git.cjs.dev.js:169:22)
      at async Object.getChangedPackagesSinceRef (/home/runner/work/firebase-js-sdk/firebase-js-sdk/node_modules/@changesets/git/dist/git.cjs.dev.js:208:24)
      at async getStatus (/home/runner/work/firebase-js-sdk/firebase-js-sdk/node_modules/@changesets/cli/dist/cli.cjs.dev.js:977:27)
      at async run$1 (/home/runner/work/firebase-js-sdk/firebase-js-sdk/node_modules/@changesets/cli/dist/cli.cjs.dev.js:1227:11)