Increase size of avatar and bussiness letter tile

Don't bother increasing the size of the ic_voicemail_avatar.
This icon isn't used in contexts that require a larger size.

Bug: 17139147
Change-Id: Id0484460cf56f5e04981727648955b0c358c7c02
diff --git a/src/com/android/contacts/common/lettertiles/LetterTileDrawable.java b/src/com/android/contacts/common/lettertiles/LetterTileDrawable.java
index 5d74bb9..e62d421 100644
--- a/src/com/android/contacts/common/lettertiles/LetterTileDrawable.java
+++ b/src/com/android/contacts/common/lettertiles/LetterTileDrawable.java
@@ -83,9 +83,9 @@
             sTileFontColor = res.getColor(R.color.letter_tile_font_color);
             sLetterToTileRatio = res.getFraction(R.dimen.letter_to_tile_ratio, 1, 1);
             DEFAULT_PERSON_AVATAR = BitmapFactory.decodeResource(res,
-                    R.drawable.ic_person_white_64dp);
+                    R.drawable.ic_person_white_120dp);
             DEFAULT_BUSINESS_AVATAR = BitmapFactory.decodeResource(res,
-                    R.drawable.ic_list_item_businessavatar);
+                    R.drawable.ic_business_white_120dp);
             DEFAULT_VOICEMAIL_AVATAR = BitmapFactory.decodeResource(res,
                     R.drawable.ic_voicemail_avatar);
             sPaint.setTypeface(Typeface.create(