Give up on using vector drawables for launch icons

Instead use svg files in art/ and a script to build the png files.

art/ic_launcher.svg

@@ -0,0 +1,26 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48">
+
+    <!-- Screen and border. -->
+    <path fill="#000"
+          stroke="#BFCBCD"
+          stroke-width="2"
+          d="M7,4
+             l34,0
+             q3 0,3 3
+             l0,34
+             q0 3, -3 3
+             l-34,0
+             q-3 0, -3-3
+             l0 -34
+             q0 -3, 3 -3"
+    />
+
+    <!-- Block cursor. -->
+    <path fill="#FFF"
+          d="M12,12
+             l5,0
+             l0,10
+             l-5,0"
+    />
+
+</svg>