v0.9 Jetpack compose renderer

v0.9 Jetpack compose renderer - see [[1-Pager] Native Android Renderer for A2UI v0.9](https://docs.google.com/document/d/1AIL7sjTM72zeyrlIH4ZzMijA2aRQO1PYrYIZF0ff2Ak/edit?resourcekey=0-JM-FjWtX5ah53YfpAKqEWA&tab=t.0#heading=h.vd8xtn2rhip) (internal Google document)

The issue references an internal Google document for a Jetpack Compose renderer for A2UI v0.9. Start by understanding the A2UI architecture and existing renderers. Look for related code in the repository, possibly under directories like 'renderers' or 'android'. The goal is to implement a new native Android renderer using Jetpack Compose.

由索引模型根据 Issue 内容生成。