Revert "Fixed octal printing of bytearrays"

This reverts commit 8b8481868877c9db407d04bdf4843e50d8920806.

Change-Id: I0876235b79cd7745312879d0f1b00c6d1c1a1b7a

java/src/main/java/com/google/protobuf/nano/MessageNanoPrinter.java

@@ -249,7 +249,7 @@ public final class MessageNanoPrinter {
             } else if (ch >= 32 && ch < 127) {
                 builder.append((char) ch);
             } else {
-                builder.append(String.format("\\%03o", ch && 0xff));
+                builder.append(String.format("\\%03o", ch));
             }
         }
         builder.append('"');