解决iOS启动第一次打开Flutter页面白屏

1、methodChannel didShowPageContainer 在启动的时候可能不可靠，引擎刚启动method channel可能发不到dart
2、Flutter 1.22之后 rootIsolate启动是异步的， methodChannel didShowPageContainer 发到dart时可能main函数还没跑完，
     此时flutter_boost还没初始化完成，路由切换失败，导致白屏。
所以需要boost启动后主动取一次路由信息

update readme to 1.17.1,update INTEGRATION.md

This reverts commit 678a1a37.

update

android dark mode support

[Action Required] Test breakage due to HeroControllerScope refactor

bugfix : 修复在华为rom上，应用进入后台，点击桌面图标，launcherActivity会被创建，导致flutterboost前台事件失效

bugfix : The LauncherActivity will be launch by clicking app icon when app enter background in HuaWei Rom, cause miss forground event

fix: BoostFlutterActivity获取activityInfo的lint错误

Pass name of BoostContainerSettings to RouteSettings, i.e. framework acknowledge the route name.

rm unnecessary params

# Conflicts:
#	example/lib/simple_page_widgets.dart
#	lib/container/container_coordinator.dart

flutter 页面 连续push的时候，后面的flutter页面的voice over焦点会丢失

fix android platform demo, add custom method channel demo, add integration.md

Update Frequently Asked Question.md

fix typo.

Harly fixed migrate 1.17