Replace `android-activity` with `android-view`, or use both what can be enabled by features.

Description

Android activity has some caveats, and one biggest is input support. Input support is dead! Yes, starting from android 15 we have new api, but what about old androids? Currently, android 15 have only 4% of users. Instead, we can try use old java api what works on all androids.
And cool, what we already crate for this!
Features of android-view:

• No C++ code.
• Meant to be usable for both pure-Rust Android applications and embedding Rust widgets in existing applications.
• Event handlers and other view callbacks run directly on the UI thread; there is no sending events to a separate Rust event loop thread.
• This crate intends to stick as close as possible to the Android framework. This will be especially important for text input support.

Its still WIP, but its next step for android support. You can check it now.

Relevant platforms

Android

Start by reviewing winit's existing Android activity integration and the android-view project linked in the issue. The issue needs a maintainer decision on replacement versus feature-based coexistence before implementation can begin; done would require an agreed scope and validated Android input support across the supported versions.