Merge "Fix MMS returns Bad Request"

                    // according to spec, "charset" should not be set. However, if the attachment

                    // is replaced with a text string, the bMessage now contains text and should

                    // have charset set to UTF-8 according to spec.

                    if (!message.getIncludeAttachments()) {

                    if (!part.mContentType.toUpperCase().contains("TEXT")

                            && !message.getIncludeAttachments()) {

                        StringBuilder sb = new StringBuilder();

                        try {

                            part.encodePlainText(sb);

                            // Each time {@code encodePlainText} is called, it adds {@code "\r\n"}

                            // to the string. {@code encodePlainText} is called here to replace

                            // an image with a string, but later on, when we encode the entire

                            // bMessage in {@link BluetoothMapbMessageMime#encode()},

                            // {@code encodePlainText} will be called again on this {@code

                            // MimePart} (as text this time), adding a second {@code "\r\n"}. So

                            // we remove the extra newline from the end.

                            int newlineIndex = sb.lastIndexOf("\r\n");

                            if (newlineIndex != -1) sb.delete(newlineIndex, newlineIndex + 4);

                            text = sb.toString();

                            part.mContentType = "text";

                        } catch (UnsupportedEncodingException e) {