How to perform CPU throttling on mobile app performance testing

I'm using android Samsung Pixel 4 device and I want to check mobile app performance on different CPU level.

Example:

Use Case 1: I want to calculate the my app launch time When the CPU usage on device is about to 30%.

Use Case 2: I want开发者_StackOverflow中文版 to calculate the my app launch time When the CPU usage on device is about to 50%.

Use Case 3: I want to calculate the my app launch time When the CPU usage on device is about to 80%.

It's kind of performance testing based on the CPU throttling.

Is there any tool which help me to simulate the CPU usage on my device so that I can test this use cases by manual?