Suppress warnings about TypeMirror.equals in some cases where we are …

…calling it deliberately.

See [] for more details

#TypeEqualsCleanup

RELNOTES=Suppress TypeEquals check

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=256471146

common/src/main/java/com/google/auto/common/MoreTypes.java

@@ -208,6 +208,7 @@ && equal(enclosingType(a), enclosingType(b), newVisiting)
     }
 
     @Override
+    @SuppressWarnings("TypeEquals")
     public Boolean visitError(ErrorType a, EqualVisitorParam p) {
       return a.equals(p.type);
     }
@@ -295,6 +296,7 @@ private Set<ComparedElements> visitingSetPlus(
     }
   }
 
+  @SuppressWarnings("TypeEquals")
   private static boolean equal(TypeMirror a, TypeMirror b, Set<ComparedElements> visiting) {
     // TypeMirror.equals is not guaranteed to return true for types that are equal, but we can
     // assume that if it does return true then the types are equal. This check also avoids getting