Does Android app need back button?

Do I always have to put "back" button in the top left corner of the app?

Following the quote:

Sometimes the back button is on the left, sometimes it’s not. They may be physical buttons, capacitive buttons, on-screen buttons, or some combination of two or three. Even the graphics for back, home, and running apps vary between devices made by different OEMs.

I suppose I always have to put back button as there might not be one on the device but it's a bit old article and now usually all Android devices have bottom navigation bar with a back button. But does it eliminate the need of the actual "back" button in the app?