allow Bridge#nativeCall to be invoked without providing any callback collections
Merge branch 'topic/do_not_require_any_types_of_callbacks'
hotfix: do not require callbacks for native APIs
added onTransitionEnd to popAll and added test cases for it

(cherry picked from commit 9fa49250e66e1353eb43b517c74f070f4e65de8e)
added onTransitionStarted handler

(cherry picked from commit d08a3cd54af832420a6cec38f3d630823446fcb7)
changelog for popAll API docs
wording fix