fix: don't use @RequiresApi with old SDK versions

[kirillzyusko]

📜 Description

Removed @RequiresApi annotations usage.

💡 Motivation and Context

When I was getting compilation issues due to usage of API which is not available in older versions I was constantly using first option provided by Android Studio: to add @RequiresApi annotation.

However it has some downsides:

• if you mark one method with this annotation - all other methods must use the same annotation if they call this method;
• this method is kind of semantic, and if you somehow accidentally call this method on older devices it will lead to crash.

So to make code structure a little bit cleaner I decided to remove those annotations and switch to if-statements. Initially the idea was to fix #1104, but turned out that [ObsoleteSdkInt] checks also if-statements. So for me as a library author there is only one reliable way to fix the issue is to suppress those warnings (if people set linter to treat warnings as errors it will prevent the lib from being compiled)

Closes #1104

📢 Changelog

Android

• rewrite @RequiresApi to if-statements;
• suppress new if-statements lint warnings via @SuppressLint;

🤔 How Has This Been Tested?

Tested in example app.

📝 Checklist

• CI successfully passed
• I added new mocks and corresponding unit-tests if library API was changed

[github-actions]

📊 Package size report

Current size	Target Size	Difference
212955 bytes	212959 bytes	-4 bytes 📉