Remove use of TextUtils.join()

Change-Id: Ie6397b1e2daa95c76809179188d6a4d5e401535b
diff --git a/src/com/android/dialer/PhoneCallDetailsHelper.java b/src/com/android/dialer/PhoneCallDetailsHelper.java
index 2604bf0..bb74cba 100644
--- a/src/com/android/dialer/PhoneCallDetailsHelper.java
+++ b/src/com/android/dialer/PhoneCallDetailsHelper.java
@@ -139,8 +139,7 @@
         mDescriptionItems.add(getCallDate(details));
 
         // Create a comma separated list from the call type or location, and call date.
-        // TextUtils.join ensures a locale appropriate list separator is used.
-        return TextUtils.join((List<CharSequence>)mDescriptionItems);
+        return TextUtils.join(", " , mDescriptionItems);
     }
 
     /**