Adding first APK build

android/gles-shaders/star.frag

@@ -0,0 +1,22 @@
+#version 100
+
+// GLES port of engine/shaders/star.frag - identical logic, plus an
+// explicit precision declaration (required in GLES). gl_PointCoord and
+// point-sprite rasterization for GL_POINTS both work automatically in
+// GLES with no separate enable call (unlike desktop's GL_POINT_SPRITE,
+// which doesn't exist in GLES at all - see
+// android/engine-patches/03-android-opengl-es-render.patch's
+// init_opengl() change).
+precision mediump float;
+
+varying float Light;
+
+void main() {
+    vec2 mid = vec2(0.5, 0.5) - gl_PointCoord;
+
+    float dist = 0.5 - length(mid);
+    dist *= 3.0;
+    dist = min(dist, 1.0);
+
+    gl_FragColor = vec4(dist * Light, dist * Light, dist * Light, 1.0);
+}