After BodDan fixed QTBUG-34582 textedit crash in raster plugin,
my application has another crash with raster plugin with logcat output
attached.

Unfortunately, it was not reproducible with textedit example;
attempts to make a small example by cutting meat from my application
have only lead to the issue not being reproducible any more.

There is a 100% reproducibility of the crash with my application, though.

The stack seen in debugger is:
0 QWindowSystemInterface::handleApplicationStateChanged qwindowsysteminterface.cpp 138 0x7382dd58
1 updateApplicationState androidjnimain.cpp 665 0x745b9dd0
2 ?? 0x40930c50
3 ?? 0x40930c50

The crash point is in the Q_ASSERT below in QWindowSystemInterface::handleApplicationStateChanged
due to QGuiApplicationPrivate::platformIntegration() returning 0x0
in the code below:

void QWindowSystemInterface::handleApplicationStateChanged(Qt::ApplicationState newState)
{
Q_ASSERT(QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ApplicationState));
QWindowSystemInterfacePrivate::ApplicationStateChangedEvent *e =
new QWindowSystemInterfacePrivate::ApplicationStateChangedEvent(newState);
QWindowSystemInterfacePrivate::handleWindowSystemEvent(e);
}

The Q_ASSERT above is based on the assumption that
QGuiApplicationPrivate::platformIntegration() cannot be NULL and no need to
check it.

THE WORKAROUND/ (FIX?) found is here:

void QWindowSystemInterface::handleApplicationStateChanged(Qt::ApplicationState newState)
{
//Q_ASSERT(QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ApplicationState));

if (! QGuiApplicationPrivate::platformIntegration())
return;

if (! QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ApplicationState))
return;

QWindowSystemInterfacePrivate::ApplicationStateChangedEvent *e =
new QWindowSystemInterfacePrivate::ApplicationStateChangedEvent(newState);
QWindowSystemInterfacePrivate::handleWindowSystemEvent(e);
}

If there's a better/proper fix, I can give it a try.