Nullability Annotations to Java Classes - DialogFragment - SDK @Override Methods

[ParaskP7]

Parent #18911

This issue is about adding the missing nullability annotations (@Nullable & @NonNull) to all SDK @Override related methods to as many Java-related DialogFragment classes as possible.

FYI: As a reference , an example would be to add the missing @Nullable annotation to the Bundle savedInstanceState parameter of the @Override onCreateDialog(...) method. The missing @Nullable or @NonNull nullability annotation of the parameter (or return value) on any @Override method can known by simply going to the super method and seeing its signature.

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### Tasks (`Vertical Approach (Safe)`)
- [ ] TODO
- [ ] TODO
- [ ] TODO

### Tasks (`Vertical Approach (Risky)`)
- [ ] TODO
- [ ] TODO
- [ ] TODO

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