feat(firebase_analytics): upgrade analytics web to v9 sdk

[russellwheatley]

Description

Analytics web v9 SDK.

This also includes a previously unsopported API: isSupported() to see if the browser supports Analytics.

Related Issues

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• I read the Contributor Guide and followed the process outlined there for submitting PRs.
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Breaking Change

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…o v9/core

[russellwheatley]

Hey @kolotum & @jorgeroncero, could you please ensure both of you have signed the CLA? We can't merge this PR until that is done. Thanks 👍

[jorgeroncero]

@russellwheatley should be OK now. I changed my github username a few weeks ago and I didn't know I had to update it on the CLA.

[kolotum]

I should have already signed the CLA. What is the comment to check this by myself?

[russellwheatley]

@jorgeroncero Thanks, that has fixed the CLA check. No worries @kolotum, you have already signed it 👍.