added a splah screen

app/src/main/res/drawable/background_splash.xml

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+            android:drawable="@color/colorPrimary"/>
+
+    <item>
+        <bitmap
+                android:gravity="center"
+                android:src="@drawable/ic_launcher"/>
+    </item>
+
+</layer-list>