Fix SpotBugs DM_DEFAULT_ENCODING by using Util helper methods for explicit UTF-8 encoding

Author: google-labs-jules[bot]

CodenameOne/src/com/codename1/io/Log.java

@@ -336,7 +336,7 @@ public static String getLogContent() {
                 char[] buffer = new char[1024];
                 int size = r.read(buffer);
                 while (size > -1) {
-                    text += Util.newString(buffer, 0, size);
+                    text += new String(buffer, 0, size);
                     size = r.read(buffer);
                 }
                 r.close();

CodenameOne/src/com/codename1/io/Util.java

@@ -159,7 +159,7 @@ public static String newString(byte[] b, int offset, int length) {
      * @param in the input stream
      * @return the reader
      */
-    public static Reader getReader(InputStream in) {
+    public static InputStreamReader getReader(InputStream in) {
         try {
             return new InputStreamReader(in, "UTF-8");
         } catch(UnsupportedEncodingException e) {
@@ -173,7 +173,7 @@ public static Reader getReader(InputStream in) {
      * @param out the output stream
      * @return the writer
      */
-    public static Writer getWriter(OutputStream out) {
+    public static OutputStreamWriter getWriter(OutputStream out) {
         try {
             return new OutputStreamWriter(out, "UTF-8");
         } catch(UnsupportedEncodingException e) {