Nullability Annotations to Java Classes

[ParaskP7]

This is the parent issue for the Add Nullability Annotations to Java Classes for JP/WPAndroid & FluxC project.

Platform Request: N/A
Project Thread: paaHJt-5fa-p2

This project is about adding missing nullability annotations (@Nullable & @NonNull) to as many Java-related classes as possible, including fields, arguments, parameters, and return values.

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Tasks

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1. Nullability Annotations to Java Classes - Replace org.jetbrains with androidx Annotations #2803
   Core Tech Debt +2
   
2. Nullability Annotations to Java Classes - Client & Response #2798
   9 of 18
   Core Tech Debt +2
   
3. Nullability Annotations to Java Classes - SqlUtils & Model #2799
   4 of 13
   Core Tech Debt +2
   
4. Nullability Annotations to Java Classes - Store #2800
   0 of 10
   Core Tech Debt +2
5. Nullability Annotations to Java Classes - Network #2853
   0 of 27
   Core Tech Debt +2
6. Nullability Annotations to Java Classes - Annotations & Processor #2827
   0 of 2
   Core Tech Debt +2
7. Nullability Annotations to Java Classes - Utils #2801
   0 of 8
   +0
8. Nullability Annotations to Java Classes - Other #2802
   0 of 6
   Core Tech Debt +2
9. Nullability Annotations to Java Classes - Example #2854
   0 of 3
   Core Tech Debt +2

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Stretch Goals

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1. Nullability Annotations to Java Classes - Add and Configure org.wordpress:lint version 2.0.0 #2818
   Core Tech Debt +2
   
2. Nullability Annotations to Java Classes - Enable and Configure UnknownNullness Android Lint Check #2822
   Core Tech Debt +2