Messaging: Fix wrong enum value

* Apparently in QPR2, Material Design specifies iconSize which is set
  as a dimension (18dp) and overwrites ours which is an enum
* Fix it by choosing a unique name for the styleable

Change-Id: I0e9f93dc5bf8d450ea987f3b1fde9641827f2f99

src/com/android/messaging/ui/ContactIconView.java

@@ -57,7 +57,7 @@ public class ContactIconView extends AsyncImageView {
         final Resources resources = context.getResources();
         final TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ContactIconView);
 
-        final int iconSizeId = a.getInt(R.styleable.ContactIconView_iconSize, 0);
+        final int iconSizeId = a.getInt(R.styleable.ContactIconView_contactIconSize, 0);
         switch (iconSizeId) {
             case NORMAL_ICON_SIZE_ID:
                 mIconSize = (int) resources.getDimension(