Possible solution to keep created surface consistent

[ztlwk]

Description

Here's the idea:

• Require the user to implement a "bridge" type, which owns the corresponding surface, and gets dropped and recreated by winit when being suspended in Android.
• Make the "bridge" type or ApplicationHandler trait include the window recreation logic, so winit can recreate the window and own it, which assured the users to have a "window" in every update.

Relevant platforms

Android