Export the rendering/renderer/rendering_method.mobile project setting to the AndroidManifest

The AndroidManifest already stores the Godot editor and library versions. The addition of this meta-data allows to identify Godot Android apps that may be subject to renderer specific issues addressed in future versions of the engine.

platform/android/java/app/AndroidManifest.xml

@@ -33,6 +33,10 @@
         <meta-data
             android:name="org.godotengine.editor.version"
             android:value="${godotEditorVersion}" />
+        <!-- Records the rendering method used by the Godot engine -->
+        <meta-data
+            android:name="org.godotengine.rendering.method"
+            android:value="${godotRenderingMethod}"/>
 
         <activity
             android:name=".GodotApp"