Export allowInterop in dart:_js_annotations
Export allowInterop in dart:_js_annotations

Change-Id: Ib64eefd52fb014e57a78bc229abe159b8023b394
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/161321
Auto-Submit: Harry Terkelsen <55e8f3f9525c3e9afde2c7c244ee420efad998f1@google.com>
Commit-Queue: Harry Terkelsen <55e8f3f9525c3e9afde2c7c244ee420efad998f1@google.com>
Commit-Queue: Sigmund Cherem <beaea8fd7d2a56555046ba4f362c8a93e3938576@google.com>
Reviewed-by: Sigmund Cherem <beaea8fd7d2a56555046ba4f362c8a93e3938576@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk