Roll engine to 66072316382837e66aaea518d219192a80839fc3 (#15000)
Roll engine to 66072316382837e66aaea518d219192a80839fc3 (#15000)

This roll contains:
* Make deprecated API unavailable (https://github.com/flutter/engine/pull/4722)
* Remove unavailable API in FlutterDartProject.h (https://github.com/flutter/engine/pull/4723)
* remove unavailabe API from FlutterDartProject.mm (https://github.com/flutter/engine/pull/4724)
* Prepare to enable global type flow analysis in AOT (https://github.com/flutter/engine/pull/4725)

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