8230415: Avoid redundant permission checking in FilePermissionCollection and SocketPermissionCollection

Reviewed-by: mullan

src/java.base/share/classes/java/io/FilePermission.java

@@ -1196,7 +1196,7 @@ final class FilePermissionCollection extends PermissionCollection
                 if ((effective & desired) == desired) {
                     return true;
                 }
-                needed = (desired ^ effective);
+                needed = (desired & ~effective);
             }
         }
         return false;

src/java.base/share/classes/java/net/SocketPermission.java

@@ -1433,7 +1433,7 @@ final class SocketPermissionCollection extends PermissionCollection
                 if ((effective & desired) == desired) {
                     return true;
                 }
-                needed = (desired ^ effective);
+                needed = (desired & ~effective);
             }
         }
         return false;