gui: New icon for NFD app

Change-Id: I48694a3da2ab3b83efc4bb808c6f24c5cd820dca
Refs: #2645
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 8ce237c..a5bab95 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -7,7 +7,7 @@
 
     <application
         android:allowBackup="true"
-        android:icon="@drawable/ic_launcher"
+        android:icon="@drawable/nfd_app"
         android:label="@string/app_name"
         android:theme="@style/AppTheme" >