Update the license headers throughout the repository to reference Google LLC rather than Google Inc, for the required license headers. PR Close #37205
Also use it to test the public API for core and common Once we have an ng_package for every package, we can remove the npm dependency on ts-api-guardian and the gulp-based public api check. PR Close #22544
This is an exact mirror of 750f651eca PR Close #22544
750f651eca