support ParametersAreNonnullByDefault

[msridhar]

We should look into supporting this annotation, which often appears at the package level. If calling a method in an unannotated package, we could check if a ParametersAreNonnullByDefault annotation is present, and if so do stronger checking on the parameter passing.

[msridhar]

We could also support MethodsAndParametersAreNonNullByDefault from javax-extras if it's easy (/cc @hzsweers)

[naturalwarren]

Supporting javax-extras should be very similar to annotations from JSR-305.

[ZacSweers]

Shouldn't it not matter? All the javax-extras annotations do is specify a TypeQualifierDefault + nullability annotation, tooling should be independent of what the source annotations are

[msridhar]

As additional context this is how Kotlin interprets nullability annotations from Java libraries. We might want to eventually do something similar