MNN Chat app analytics for October 20

This is a multimodal language model (LLM) Android app Multimodal Support: Enables functionality across diverse tasks, including text-to-text, image-to-text, audio-to-text, and text-to-image generation (via diffusion models). CPU Inference Optimization: MNN-LLM demonstrates exceptional performance in CPU benchmarking in Android. Broad Model Compatibility: Supports multiple leading model providers, such as Qwen, Gemma, Llama (including TinyLlama and MobileLLM), Baichuan, Yi, DeepSeek, InternLM, Phi, ReaderLM, and Smolm. Privacy First: Runs entirely on-device, ensuring complete data privacy with no information uploaded to external servers.