Address use of default constructors in java.logging

Summary

Add explicit constructors to two classes in java.logging using default constructors.

Problem

Default constructors are not recommend for formal API classes.

Solution

Add the elided constructors.

Specification

--- old/src/java.logging/share/classes/java/util/logging/ErrorManager.java  2020-07-23 10:30:58.570574191 -0700
+++ new/src/java.logging/share/classes/java/util/logging/ErrorManager.java  2020-07-23 10:30:58.126574191 -0700
@@ -39,6 +39,11 @@
 public class ErrorManager {
    private boolean reported = false;

+    /**
+     * Create an {@code ErrorManager}.
+     */
+    public ErrorManager() {}
+
     /*
      * We declare standard error codes for important categories of errors.
      */
--- old/src/java.logging/share/classes/java/util/logging/SimpleFormatter.java   2020-07-23 10:30:59.390574191 -0700
+++ new/src/java.logging/share/classes/java/util/logging/SimpleFormatter.java   2020-07-23 10:30:58.942574191 -0700
@@ -66,6 +66,11 @@
         SurrogateLogger.getSimpleFormat(SimpleFormatter::getLoggingProperty);

     /**
+     * Create a {@code SimpleFormatter}.
+     */
+    public SimpleFormatter() {}
+
+    /**
      * Format the given LogRecord.
      * <p>
      * The formatting can be customized by specifying the format string