[frontend, android] Move update_checker to frontend_common and add Android support (#2687)

I still have to add a setting to disable the auto update checking on a later PR, firstly lets make sure i didn't accidentally break anything  with CMAKE. or QT.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2687
Reviewed-by: Lizzie <lizzie@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: Inix <Nixy01@proton.me>
Co-committed-by: Inix <Nixy01@proton.me>

src/yuzu/main.h

@@ -32,7 +32,7 @@
 #include <QtDBus/QtDBus>
 #endif
 
-#ifdef ENABLE_QT_UPDATE_CHECKER
+#ifdef ENABLE_UPDATE_CHECKER
 #include <QFuture>
 #include <QFutureWatcher>
 #endif
@@ -420,7 +420,7 @@ private slots:
     void OnEmulationStopped();
     void OnEmulationStopTimeExpired();
 
-#ifdef ENABLE_QT_UPDATE_CHECKER
+#ifdef ENABLE_UPDATE_CHECKER
     void OnEmulatorUpdateAvailable();
 #endif
 
@@ -476,7 +476,7 @@ private:
     std::unique_ptr<PlayTime::PlayTimeManager> play_time_manager;
     std::shared_ptr<InputCommon::InputSubsystem> input_subsystem;
 
-#ifdef ENABLE_QT_UPDATE_CHECKER
+#ifdef ENABLE_UPDATE_CHECKER
     QFuture<QString> update_future;
     QFutureWatcher<QString> update_watcher;
 #endif