Fix crashes associated with new logic to replace entire address with name + address

Fixes b/7257614 crash when replying to a message

Change-Id: I6dcda376073f941fba4b09a647bdb00a92e4ccce
diff --git a/chips/src/com/android/ex/chips/RecipientEditTextView.java b/chips/src/com/android/ex/chips/RecipientEditTextView.java
index fde4b6e..615e886 100644
--- a/chips/src/com/android/ex/chips/RecipientEditTextView.java
+++ b/chips/src/com/android/ex/chips/RecipientEditTextView.java
@@ -2334,8 +2334,6 @@
                 mHandler.post(new Runnable() {
                     @Override
                     public void run() {
-                        SpannableStringBuilder text = new SpannableStringBuilder(getText()
-                                .toString());
                         Editable oldText = getText();
                         int start, end;
                         int i = 0;
@@ -2351,13 +2349,12 @@
                                         createAddressText(replacement.getEntry()).trim());
                                 displayText.setSpan(replacement, 0, displayText.length(),
                                         Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
-                                text.replace(start, end, displayText);
+                                oldText.replace(start, end, displayText);
                                 replacement.setOriginalText(displayText.toString());
                             }
                             i++;
                         }
                         originalRecipients.clear();
-                        setText(text);
                     }
                 });
             }