What is the best product to use for automated testing of android firmware?

Question

Android

I'll start with a short introduction.
There is a company where one of the departments is constantly testing firmware for android devices. Full firmware testing consists of 500 tests, takes 3 days, all tests are manual (install it, click it).
The goal is to automate the testing process as much as possible. Now there are a great many different tools for automated testing, you need to find the best one.
1. This tool needs to be able to "click" the recorded backbox script, hence the ability to create scripts is needed.
2. Most products are scripted using either Java or Python. The maximum simplicity of creating a script is desirable, a junior or just a person with a head should understand.
3. The product must be free
4. There must be good documentation.

Answer 1

I am very far from the topic, but I remembered this video https://www.youtube.com/watch?v=Vh4zteNn_l4
And this is exactly what you need. You won't find any of these for free.
You can try to root devices and write some tests with sending control commands and recognition through the camera. But this is the level of a hardcore engineer, which will cost you more than the above product.