[flutter_tools] always run build tests on presubmit (#67654)
[flutter_tools] always run build tests on presubmit (#67654)


Hixie/flutter,tvolkert/flutter,flutter/flutter,Hixie/flutter,Hixie/flutter,Hixie/flutter,tvolkert/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,Hixie/flutter,Hixie/flutter,cbracken/flutter,tvolkert/flutter,cbracken/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,cbracken/flutter,flutter/flutter,tvolkert/flutter,flutter/flutter,tvolkert/flutter,cbracken/flutter,cbracken/flutter,flutter/flutter,flutter/flutter,cbracken/flutter,flutter/flutter,cbracken/flutter,cbracken/flutter,Hixie/flutter,flutter/flutter