Added spinner_bg drawable

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

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android" >
+    <item>
+        <shape>
+            <corners android:radius="10dp" />
+            <solid android:color="@color/colorGrayLight" />
+            <!--<stroke
+                android:width="1dp"
+                android:color="@color/colorSecondaryDark" />-->
+        </shape>
+    </item>
+    <item android:right="12dp">
+        <bitmap
+            android:gravity="end"
+            android:src="@android:drawable/arrow_down_float" />
+    </item>
+</layer-list>