Show OpenGL or OpenGL ES on Android depending on what the device supports.

Reduces confusion for the users

Source/Android/res/values-ja/strings.xml

@@ -150,6 +150,7 @@
     <string name="video_settings">ビデオ</string>
     <string name="software_renderer">Software Renderer</string>
     <string name="opengl_es3">OpenGL ES</string>
+    <string name="opengl">OpenGL</string>
     <string name="video_backend">ビデオレンダラ</string>
     <string name="video_backend_desc">%s</string>
     <string name="show_fps">FPSを表示</string>