Messaging: change Avatar fontFamily to sans-serif-medium

Match the changes in ContactsCommon

Test: m
Change-Id: Ica94f00e6121c550ea0bc1dfe73a52162dccda71
diff --git a/src/com/android/messaging/datamodel/media/AvatarRequest.java b/src/com/android/messaging/datamodel/media/AvatarRequest.java
index 22d5ccc..6a738c7 100644
--- a/src/com/android/messaging/datamodel/media/AvatarRequest.java
+++ b/src/com/android/messaging/datamodel/media/AvatarRequest.java
@@ -161,7 +161,7 @@
                 getBackgroundColor());
         final Resources resources = mContext.getResources();
         final Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
-        paint.setTypeface(Typeface.create("sans-serif-thin", Typeface.NORMAL));
+        paint.setTypeface(Typeface.create("sans-serif-medium", Typeface.NORMAL));
         paint.setColor(resources.getColor(R.color.letter_tile_font_color));
         final float letterToTileRatio = resources.getFraction(R.dimen.letter_to_tile_ratio, 1, 1);
         paint.setTextSize(letterToTileRatio * minOfWidthAndHeight);