Enable high-res CPU profile sampling for app startup

### Use case

Right now the CPU profiler in DevTools has to be manually started. You can ask it for any samples that may have been captured during startup, but they usually only cover a very brief window of time during startup.

### Proposal

There needs to be an option to start high-res CPU profiling sampling automatically, as soon as the app is started up, so that the startup activity can be fully profiled.

首先定位 DevTools CPU profiler 和启动 profiling 流程，然后将它们与现有的手动启动采样行为进行比较。当某个选项能够在应用启动时自动开始高分辨率 CPU 采样，并捕获完整的启动活动时，这项工作就完成了。

由索引模型根据 Issue 内容生成。