[CP] Update analytics message and carry forward legacy opt-outs

[jcollins-g]

Commit(s) to merge

a6ebd6f

Target

beta

Prepared changelist for beta/stable

https://dart-review.googlesource.com/c/sdk/+/295920

Issue Description

The PDD intended for analytics to actually substitute dart and flutter into the analytics message rather than using literally [dart|flutter]. Analytics does not import settings from the legacy analytics package.

What is the fix

String substitution, and a best effort attempt to carry forward the legacy analytics settings from dart or flutter into unified analytics.

Why cherry-pick

The string substitution is minor, but a lack of it could confuse users if they do not understand that [dart|flutter] in a command line is not to be taken literally. The honoring of opt-outs should be cherrypicked as it will be more convenient for users.

Risk

low

Issue link(s)

dart-lang/tools#74

Extra Info

No response

[jcollins-g]

Closing; somehow a duplicate issue was created.