Fix headaches when reading osu!droid code.

[Reco1I]

Recreating PR with better commit structure.

This is a Intellij IDEA Code Inspection tool assisted reformat and cleanup which only affects the main package ru.nsu.ccfit.zuev.

[Reco1I]

👍🏻

[Reco1I]

I gonna close this because will be a mess to merge now.

Anyways there's some things that needs to be looked and eventually fixed/merged:

• Commits 6617c13 and 149f0a7, these 2 are intended to improve performance.
• Commits marked with Bugs tag (these are extremely important).
• Commits marked with Performance tag.
• Commits marked with Java tag.

[ammarasyad]

Noted. Some changes here may be incorporated to osu!droid in the future, accounting for changes not present in this PR.