Reformat code with default formatter

[Doctoror]

The reason is that usually I run automatic formatter after every change, and I get unrelated changes in diffs.

Also, I am working on increasing the frame rate by generating new frames, it would be nice if the frames are also formatted.

Changes:

• reformat with default Android Studio formatter
• organize imports
• disable formatting for some parts of code
• mark final classes and variables as final
• reduce visibility to package-private where possible
• use conventional naming pattern for constants

No changes in logic or values.

Reason to use final modifiers:

• protects from accidental change
• when reading the code, if variables are final you know right away that they are never changed

Reason for reducing visibility scope (adding private and replacing with package-private):

• easier to understand where the code is used from when reading