Filter implicit annotations from our implementation of TypeMirror.getAnnotationMirrors()

[stephan-herrmann]

Follow-up from #5042 (comment)

We should probably exclude all "implicit" annotations from our implementation of https://docs.oracle.com/en/java/javase/16/docs/api/java.compiler/javax/lang/model/type/TypeMirror.html#getAnnotationMirrors()

As implicit we should see all annotations internally added

• due to @NonNullByDefault
• based on inheritance (if that option is enabled).

[srikanth-sankaran]

@stephan-herrmann - If you want I can take over this. If you concur, please assign to me. Thanks.

[stephan-herrmann]

If you want I can take over this. If you concur, please assign to me.

I gladly did so. Feel free to ask anything you need to know about synthesized null annotations.