[2021.1 compat] Use raw PairProcessor as parameter for PatternConditionPlus#processValues

The API for `PatternConditionPlus#processValues` changed to take wildcard generics (PairProcessor<? super Value, ? super ProcessingContext> instead of PairProcessor<Value, ProcessingContext>) in [this commit](JetBrains/intellij-community@bb440db#diff-84c9e84629ba27c39287fb6c8630c7a61fe77d835a96eafad33f0790de09079c).

To make this work across both API levels, we use PairProcessor as a raw parameter.

PiperOrigin-RevId: 375055419

Author: mai93

java/src/com/google/idea/blaze/java/lang/build/references/JavaClassQualifiedNameReference.java

@@ -46,13 +46,16 @@ public class JavaClassQualifiedNameReference
               psiElement(Keyword.class)
                   .with(nameCondition(StandardPatterns.string().oneOf(JAVA_CLASS_STRING_TYPES))));
 
+  // #api203: remove "@SuppressWarnings({"rawtypes", "RedundantSuppression"})"
+  @SuppressWarnings({"rawtypes", "RedundantSuppression"})
   private static PatternCondition<PsiElementBase> nameCondition(final ElementPattern<?> pattern) {
     return new PatternConditionPlus<PsiElementBase, String>("_withPsiName", pattern) {
       @Override
       public boolean processValues(
           PsiElementBase t,
           ProcessingContext context,
-          PairProcessor<String, ProcessingContext> processor) {
+          // #api203 replace with "PairProcessor<? super String, ? super ProcessingContext>"
+          PairProcessor processor) {
         return processor.process(t.getName(), context);
       }
     };