added codes about AndroidVersion and SOC

inc/hgl/platform/Android.h

@@ -0,0 +1,18 @@
+#pragma once
+
+namespace hgl
+{
+    struct AndroidVersion
+    {
+        unsigned int major;
+        unsigned int minor;
+        unsigned int patch;
+
+        char postfix;
+    };
+
+    /**
+    * 根据版本号取得Android的APILevel,如若出错返回-1
+    */
+    const int GetAndroidAPILevel(const AndroidVersion &);
+}//namespace hgl