Fix too-light color in "write your own" dialog EditText

Incoming call UI brings up a dialog when the user selects "Write your
own", the color of this text was too light too see. This CL fixes that.

Bug: 15895628
Change-Id: I93fdb1fa4fa3b9fbf1b5e0a4ad32774f468bc6e5
diff --git a/InCallUI/src/com/android/incallui/AnswerFragment.java b/InCallUI/src/com/android/incallui/AnswerFragment.java
index 371a3ca..7462b12 100644
--- a/InCallUI/src/com/android/incallui/AnswerFragment.java
+++ b/InCallUI/src/com/android/incallui/AnswerFragment.java
@@ -256,9 +256,9 @@
      */
     public void showCustomMessageDialog() {
         // Create an alert dialog containing an EditText
-        final EditText et = new EditText(getActivity());
-        final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()).setCancelable(
-                true).setView(et)
+        final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
+        final EditText et = new EditText(builder.getContext());
+        builder.setCancelable(true).setView(et)
                 .setPositiveButton(R.string.custom_message_send,
                         new DialogInterface.OnClickListener() {
                     @Override