Expose the application Configuration by reference

This provides an API to access `Configuration` state for the application
without having to make deep copies of the large `Configuration` struct.

This should avoid the need for Winit to create a global static copy of
the Configuration whenever it changes - and instead it can just get
a `ConfigurationRef` which will always reflect the latest config for
the application.

Fixes: #5

examples/agdk-mainloop/src/lib.rs

@@ -52,6 +52,9 @@ fn android_main(app: AndroidApp) {
                             MainEvent::InputAvailable { .. } => {
                                 redraw_pending = true;
                             }
+                            MainEvent::ConfigChanged { .. } => {
+                                info!("Config Changed: {:#?}", app.config());
+                            }
                             MainEvent::LowMemory => {}
 
                             MainEvent::Destroy => quit = true,

examples/na-mainloop/.idea/gradle.xml

@@ -13,7 +13,6 @@
             <option value="$PROJECT_DIR$/app" />
           </set>
         </option>
-        <option name="resolveModulePerSourceSet" value="false" />
       </GradleProjectSettings>
     </option>
   </component>

examples/na-mainloop/src/lib.rs

@@ -52,6 +52,9 @@ fn android_main(app: AndroidApp) {
                             MainEvent::InputAvailable { .. } => {
                                 redraw_pending = true;
                             }
+                            MainEvent::ConfigChanged { .. } => {
+                                info!("Config Changed: {:#?}", app.config());
+                            }
                             MainEvent::LowMemory => {}
 
                             MainEvent::Destroy => quit = true,