Add material icons golden test (#74131)
Add material icons golden test (#74131)

* Create icons golden test

* Update icons_test.dart

* Update icons_test.dart

* Update icons_test.dart

* change test name

* Add ability to load material icon font for golden tests

* formatting

* Skip test for browser

* Add end of file newline

* Rewrite with different method

* Add skip for browser
Hixie/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,tvolkert/flutter,tvolkert/flutter,tvolkert/flutter,Hixie/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,Hixie/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,tvolkert/flutter,tvolkert/flutter,tvolkert/flutter,flutter/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter