Don't crash on Android
Don't crash on Android

If the platform plugin does not support the features needed
for QQuickWidget, then don't try to use it. This is a minimal
change to stop applications from crashing: it does not give
the application a way to find out if QQuickWidget is supported,
since that would mean new API, which we can't do in a patch
release.

Task-number: QTBUG-38268
Change-Id: I975a03b105b1d5c21a1d8ae440a5802ce8c1967b
Reviewed-by: Laszlo Agocs <00c05606d635b5d8e1450a8536e4e2809abe4e80@digia.com>

qmlc/qtdeclarative,qmlc/qtdeclarative,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative