qml: implement toggle for android SECURE_FLAG and add marker to wizard pages

that should be secured.

contrib/android/Dockerfile

@@ -180,7 +180,7 @@ RUN cd /opt \
     && git remote add accumulator https://github.com/accumulator/python-for-android \
     && git fetch --all \
     # commit: from branch accumulator/electrum_20210421d (note: careful with force-pushing! see #8162)
-    && git checkout "087fc3c583d46bfb2dec54878ddea508afb27de6^{commit}" \
+    && git checkout "052b9f7945bae557347fa4a4b418040d9da9eaff^{commit}" \
     && python3 -m pip install --no-build-isolation --no-dependencies --user -e .
 
 # build env vars

electrum/gui/qml/components/wizard/WCConfirmSeed.qml

@@ -8,6 +8,8 @@ import ".."
 import "../controls"
 
 WizardComponent {
+    securePage: true
+
     valid: false
 
     function checkValid() {

electrum/gui/qml/components/wizard/WCCreateSeed.qml

@@ -7,6 +7,8 @@ import org.electrum 1.0
 import "../controls"
 
 WizardComponent {
+    securePage: true
+
     valid: seedtext.text != ''
 
     function apply() {

electrum/gui/qml/components/wizard/WCHaveMasterKey.qml

@@ -9,6 +9,7 @@ import "../controls"
 
 WizardComponent {
     id: root
+    securePage: true
 
     valid: false
 

electrum/gui/qml/components/wizard/WCHaveSeed.qml

@@ -9,6 +9,7 @@ import "../controls"
 
 WizardComponent {
     id: root
+    securePage: true
 
     valid: false
 

electrum/gui/qml/components/wizard/WCImport.qml

@@ -8,6 +8,7 @@ import "../controls"
 
 WizardComponent {
     id: root
+    securePage: true
 
     valid: false
 

electrum/gui/qml/components/wizard/Wizard.qml

@@ -2,6 +2,8 @@ import QtQuick 2.6
 import QtQuick.Layouts 1.0
 import QtQuick.Controls 2.1
 
+import org.electrum 1.0
+
 import "../controls"
 
 ElDialog {
@@ -141,6 +143,11 @@ ElDialog {
                 _setWizardData({})
             }
 
+            Binding {
+                target: AppController
+                property: 'secureWindow'
+                value: pages.contentChildren[pages.currentIndex].securePage
+            }
         }
 
         ColumnLayout {

electrum/gui/qml/components/wizard/WizardComponent.qml

@@ -11,6 +11,7 @@ Pane {
     property bool valid
     property bool last: false
     property string title: ''
+    property bool securePage: false
 
     leftPadding: constants.paddingXLarge
     rightPadding: constants.paddingXLarge

electrum/gui/qml/qeapp.py

@@ -67,6 +67,7 @@ class QEAppController(BaseCrashReporter, QObject):
     sendingBugreport = pyqtSignal()
     sendingBugreportSuccess = pyqtSignal(str)
     sendingBugreportFailure = pyqtSignal(str)
+    secureWindowChanged = pyqtSignal()
 
     def __init__(self, qedaemon: 'QEDaemon', plugins: 'Plugins'):
         BaseCrashReporter.__init__(self, None, None, None)
@@ -79,6 +80,7 @@ class QEAppController(BaseCrashReporter, QObject):
         self._crash_user_text = ''
         self._app_started = False
         self._intent = ''
+        self._secureWindow = False
 
         # set up notification queue and notification_timer
         self.user_notification_queue = queue.Queue()
@@ -295,6 +297,18 @@ class QEAppController(BaseCrashReporter, QObject):
             return
         jview.performHapticFeedback(jHfc.VIRTUAL_KEY)
 
+    @pyqtProperty(bool, notify=secureWindowChanged)
+    def secureWindow(self):
+        return self._secureWindow
+
+    @secureWindow.setter
+    def secureWindow(self, secure):
+        if not self.isAndroid():
+            return
+        if self._secureWindow != secure:
+            jpythonActivity.setSecureWindow(secure)
+            self._secureWindow = secure
+            self.secureWindowChanged.emit()
 
 class ElectrumQmlApplication(QGuiApplication):