qml: don't import QtMultimedia when running on android (android 8 compat)

electrum/gui/qml/components/ScanDialog.qml

@@ -6,7 +6,8 @@ import org.electrum
 
 import "controls"
 
-// currently not used on android, kept for future use when qt6 camera stops crashing
+// currently not used on android, kept for testing on desktop, and future use
+// on android when qt6 camera support becomes usable (i.e. stops crashing)
 ElDialog {
     id: scanDialog
 
@@ -50,4 +51,6 @@ ElDialog {
             onClicked: doReject()
         }
     }
+
+    onClosed: destroy()
 }

electrum/gui/qml/components/main.qml

@@ -7,7 +7,6 @@ import QtQuick.Controls.Material.impl
 import QtQuick.Window
 
 import QtQml
-import QtMultimedia
 
 import org.electrum 1.0
 
@@ -450,12 +449,6 @@ ApplicationWindow
             onFinished: destroy()
         }
     }
-    Component {
-        id: _qtScanDialog
-        ScanDialog {
-            onClosed: destroy()
-        }
-    }
 
     Component {
         id: crashDialog
@@ -533,7 +526,8 @@ ApplicationWindow
         if (AppController.isAndroid()) {
             app.scanDialog = _scanDialog
         } else {
-            app.scanDialog = _qtScanDialog
+            // for running on Desktop. uses QtMultimedia.
+            app.scanDialog = Qt.createComponent('ScanDialog.qml')
         }
 
         function continueWithServerConnection() {