11877 Finish plumbing message responses on method channels (cla: yes)

11880 Handle new navigation platform messages (cla: yes, platform-web)

11883 LTO fuchsia binaries (cla: yes)

11886 remove extra redundant channels setup in iOS embedding engine (cla: yes)

11890 Add some AppLifecycleTests (CQ+1, cla: yes)

11893 Add @Keep annotation (cla: yes)

11899 Improve input method and Unicode character display(#30661) (cla: yes)

11902 Remove un-needed FragmentActivity import statements to facilitate proguard. (cla: yes)

11912 Document dependencies and remove support-v13 (cla: yes)