Replace QSystemTrayIcon with a empty stub on Android

Should hopefully fix the Android builds on binary factory.

src/systrayicon.cpp

@@ -6,6 +6,7 @@
 
 #include "systrayicon.h"
 
+#ifndef Q_OS_ANDROID
 #include <QCoreApplication>
 #include <QFile>
 #include <QMenu>
@@ -117,6 +118,12 @@ SystrayIcon::SystrayIcon(QObject *parent)
         show();
     }
 }
+#else
+SystrayIcon::SystrayIcon(QObject *parent)
+    : QObject(parent)
+{
+}
+#endif
 
 SystrayIcon::~SystrayIcon()
 {
@@ -124,5 +131,9 @@ SystrayIcon::~SystrayIcon()
 
 bool SystrayIcon::available() const
 {
+#ifndef Q_OS_ANDROID
     return QSystemTrayIcon::isSystemTrayAvailable();
+#else
+    return false;
+#endif
 }

src/systrayicon.h

@@ -7,9 +7,16 @@
 #pragma once
 
 #include <QObject>
+#ifndef Q_OS_ANDROID
 #include <QSystemTrayIcon>
+#endif
 
-class SystrayIcon : public QSystemTrayIcon
+class SystrayIcon
+#ifndef Q_OS_ANDROID
+    : public QSystemTrayIcon
+#else
+    : public QObject
+#endif
 {
     Q_OBJECT