I18n-aware HtmlParser

[vsavkin]

• Please check if the PR fulfills these requirements
• The commit message follows our guidelines: https://github.com/angular/angular/blob/master/CONTRIBUTING.md#commit-message-format
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)
• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

It adds an implementation of HtmlParser that is 18n-aware.

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

No

• Other information:

[mary-poppins]

Merging PR #7738 on behalf of @kara to branch presubmit-kara-pr-7738.

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