widget: new background with round corners and transparency

vlc-android/res/drawable/background.xml

+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android" >
+
+    <gradient
+        android:angle="270"
+        android:centerColor="#CC000000"
+        android:endColor="#CC333333"
+        android:startColor="#CC333333" />
+
+    <corners android:radius="10dp" />
+
+    <stroke
+        android:width="2px"
+        android:color="#88000000" />
+
+</shape>
\ No newline at end of file

vlc-android/res/layout/vlcwidget.xml

@@ -4,7 +4,7 @@
     android:layout_height="wrap_content"
     android:layout_gravity="center"
     android:layout_margin="10dp"
-    android:background="@drawable/bg_with_shadow"
+    android:background="@drawable/background"
     android:clickable="true"
     android:clipChildren="true"
     android:gravity="center"