Change style_unread_message.xml to style_total_unread_messages.xml

Also, change the rectangle shape to oval shape.

app/src/main/res/drawable/style_unread_message.xml → app/src/main/res/drawable/style_total_unread_messages.xml

 <?xml version="1.0" encoding="utf-8"?>
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
-    android:shape="rectangle">
+    android:shape="oval">
 
     <solid
         android:color="@color/colorAccent" />
 
-    <corners
-        android:radius="6dp" />
-
 </shape>
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