Split Android graphics context implementations into their own files.

android/jni/AndroidJavaGLContext.cpp

@@ -0,0 +1,19 @@
+#include "AndroidJavaGLContext.h"
+#include "base/NativeApp.h"
+#include "gfx_es2/gpu_features.h"
+#include "Core/System.h"
+
+AndroidJavaEGLGraphicsContext::AndroidJavaEGLGraphicsContext() {
+	CheckGLExtensions();
+	draw_ = Draw::T3DCreateGLContext();
+	SetGPUBackend(GPUBackend::OPENGL);
+	bool success = draw_->CreatePresets();
+	assert(success);
+}
+
+void AndroidJavaEGLGraphicsContext::Shutdown() {
+	ILOG("AndroidJavaEGLGraphicsContext::Shutdown");
+	delete draw_;
+	draw_ = nullptr;
+	NativeShutdownGraphics();
+}