Xinput: Avoid misdetecting certain trackballs as tablets

The algorithm triggers on the word "cursor" in the device name, which
would also happen for devices from the manufacturer Cursor Controls.

Task-number: QTBUG-48034
Change-Id: I9645c0d0bc1fa951d0ea00480572fd0df0220eb5
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>

src/plugins/platforms/xcb/qxcbconnection_xi2.cpp

@@ -220,7 +220,7 @@ void QXcbConnection::xi2SetupDevices()
             isTablet = true;
             tabletData.pointerType = QTabletEvent::Eraser;
             dbgType = QLatin1String("eraser");
-        } else if (name.contains("cursor")) {
+        } else if (name.contains("cursor") && !(name.contains("cursor controls") && name.contains("trackball"))) {
             isTablet = true;
             tabletData.pointerType = QTabletEvent::Cursor;
             dbgType = QLatin1String("cursor");