update icons of sample apps

update the size and the location of icons

Author: lyingdragon

Sample_BeanbirdInCircle/src/main/AndroidManifest.xml

@@ -14,7 +14,7 @@
 
     <application
         android:allowBackup="true"
-        android:icon="@drawable/ic_launcher"
+        android:icon="@drawable/icon"
         android:label="@string/app_name"
         android:theme="@style/AppTheme"
         tools:replace="android:theme, android:label" >