Error Prone Files

New checks:

• BoxingComparator: Detect implicitly-boxing Comparator.comparing key extractors
• ExposedPrivateType: Discourage references to private member classes from non-private APIs
• JUnitMethodInvoked: Discourage directly invoking JUnit test methods
• ListRemoveAmbiguous: Detect ambiguous calls to List.remove(int|Integer)
• PreferTestParameter: suggests using @TestParameter instead of @TestParameters for exhaustive boolean and enum parameters on single-element parameterized tests
• RecordComponentAccessorAnnotationConflict: Detect conflicts between record components and explicit accessor methods
• RecordComponentOverride: Discourage @Override on record component declarations that don't override anything
• ThrowableEqualsHashCode: Discourage overriding Throwable.equals() and hashCode()

Closed issues: [#5553], [#5649], [#5778]

Full changelog: https://github.com/google/error-prone/compare/v2.49.0...v2.50.0