Adding first APK build

android/gles-shaders/color.frag

@@ -0,0 +1,13 @@
+#version 100
+
+// GLES port of engine/shaders/color.frag - identical logic, just needs an
+// explicit precision declaration (required in GLES fragment shaders, not
+// valid in desktop GLSL).
+precision mediump float;
+
+varying vec4 Color;
+varying float Light;
+
+void main() {
+    gl_FragColor = vec4(Color.r * Light, Color.g * Light, Color.b * Light, Color.a);
+}