SkyShell should be able to draw a green square with GL

sky/shell/BUILD.gn

Index: sky/shell/BUILD.gn
diff --git a/sky/shell/BUILD.gn b/sky/shell/BUILD.gn
index 624472d4b2d3d297d6685929f1ccc6de19166b6b..80c894f3f3e858c7f69d6e6866d1092344283729 100644
--- a/sky/shell/BUILD.gn
+++ b/sky/shell/BUILD.gn
@@ -16,17 +16,26 @@ group("shell") {
 generate_jni("jni_headers") {
   sources = [
     "apk/src/org/domokit/sky/shell/SkyMain.java",
+    "apk/src/org/domokit/sky/shell/SkyView.java",
   ]
   jni_package = "sky/shell"
 }
 
 shared_library("sky_shell") {
   sources = [
+    "gpu_driver.cc",
+    "gpu_driver.h",
     "library_loader.cc",
+    "shell.cc",
+    "shell.h",
     "sky_main.cc",
     "sky_main.h",
+    "sky_view.cc",
+    "sky_view.h",
   ]
 
+  configs += [ "//third_party/khronos:khronos_headers" ]
+
   deps = [
     "//base",
     "//build/config/sanitizers:deps",
@@ -40,6 +49,7 @@ android_library("java") {
     "apk/src/org/domokit/sky/shell/SkyMain.java",
     "apk/src/org/domokit/sky/shell/SkyShellActivity.java",
     "apk/src/org/domokit/sky/shell/SkyShellApplication.java",
+    "apk/src/org/domokit/sky/shell/SkyView.java",
   ]
 
   deps = [