Config: New Check UnnecessaryNullCheckWithInstanceOf

Author: Anmol202005

checkstyle-tester/checks-nonjavadoc-error.xml

@@ -354,6 +354,7 @@
     <module name="StringLiteralEquality"/>
     <module name="SuperClone"/>
     <module name="SuperFinalize"/>
+    <module name="UnnecessaryNullCheckWithInstanceOf"/>
     <module name="UnnecessaryParentheses"/>
     <module name="UnnecessarySemicolonAfterOuterTypeDeclaration"/>
     <module name="UnnecessarySemicolonAfterTypeMemberDeclaration"/>