fix：增加漏传的文件

# Conflicts:
#	example/lib/simple_page_widgets.dart

feat：增加了flutter与iOS原生侧滑冲突的一种解决方案：

Update 0.0.412

Update 0.0.412

	  https://juejin.im/post/5cf8e4b96fb9a07ed440f1d8

Result mediator

Revert "update gradle plugin to 3.3.2"

This reverts commit fda8dd5d.

2,Dart page result Handling

- Accessibility switch 
- xservice_kit 0.0.27
- Some code opt
- Spellings

2,Some code opt.

Add libc++ dependency in flutter_boost.podspec

update gradle plugin to 3.3.2