chore(release): 7.1.1 (angular#3024)

chore(release): Fix hang in the test suite (angular#3005)

* Check for file existence before `npm install` on deploy, this was hanging up in some test environments
* Prefer absolute paths on the deploy pipeline
* Fix `ng add` stalling if you don't select any options

feat(core): Flushing out the new API (angular#2963)

* Adding `ScreenTrackingService` and `UserTrackingService` for the new API
* Injectable classes should all be implicitly optional, since I can't figure out how to bail from the factory
* Drop the memoization as the modules are idempotent in v9
* Return `null` from analytics and messaging when they're incompatible, rather than a null object
* Now test for browser and return `null` otherwise for remote config and performance
* Allow more advanced initialization in `provide*` by allowing the developer to pass deps into the N+1 args & use the injector in the factory
* Use AppCheck debug token if they're serving off localhost too, e.g, `ng deploy --preview`
* Upgrade Firebase to 9.1
* Utilize isSupported for Remote Config

fix(schematics): Various improvements (angular#2961)

* Support multiple package managers on ng deploy, fixes angular#2841
* Don't cache ngsw, fixes angular#2259
* Got rid os AppCheck debug token on Node, opted for a better pattern in `samples/advanced`
* Added a new pattern for connecting the emulators in `samples/advanced`

feat(schematics): adding multi-user support. (angular#2958)

Utilize firebase-tools multi user support to allow an account picker on `ng add`

fixes(schematics): ng add/deploy universal fixes (angular#2954)

* `findModuleFromOptions` wasn't working well when SSR was added to the mix, drop
* shell out the logged in user(s)
* fixed Cloud Functions dependencies all being dev
* added `file-loader` dep so the Firestore loaders work out of box

fix(schematics): Missing deps, fixed ng add bug (angular#2952)

feat(schematics): Super charge the schematics (angular#2836)


Co-authored-by: Tomek Sułkowski <sulco@users.noreply.github.com>

chore(release): Release 7.0.4 (angular#2928)

chore(release): 7.0.3 (angular#2915)

* Deploy server default is `bundleDependencies: true`, correct this when generating the functions package.json
* `onMessage` callback should fire in the ng zone
* Auth was wrapping exports it wasn't suppose to
* Don't fail the deploy if there isn't an `index.html` file
* Lazifying the sample
* Cleaning up user-agent reporting
* Marking the samples as autogenerated, to reduce noise
* Committing the firebase/rxfire/base.ts files for easier readability
* Version and changelog entry
* Test cleanup and get storage emulator working