refactor: remove unused mHandler variable

chore: update readme, add scene_dialog dependency

chore: update gradle dependency

chore: add lifecycle graph to comment

refactor: downgrade lifecycle library to 2.0.0

refactor: SceneActivity add getHomeSceneArguments(Intent)

feature: ChildSceneLifecycleCallbacks add onSceneViewCreated

fix: fix sometimes shared element animation is not working after star…

…tPostponedEnterTransition()

chroe: update readme, remove "bytedance"

chroe: fix demo compile issue