[launcher] build for Android

also embeds icons and translations as Qt resources instead of reading from disk

launcher/prepare.h

@@ -0,0 +1,15 @@
+/*
+ * prepare.h, part of VCMI engine
+ *
+ * Authors: listed in file AUTHORS in main folder
+ *
+ * License: GNU General Public License v2.0 or later
+ * Full text of license available in license.txt file, in main folder
+ *
+ */
+#pragma once
+
+namespace launcher
+{
+void prepare();
+}