Updated the example to accept input on Android

The Android inputMethod doesn't commit the text
until a word is chosen from the suggestions list.
This makes the URL for XMLHTTPRequest invalid. To avoid
the invalid URL, we should either not use predictive text
or explicitly commit the text. I choose to go with the earlier
option.

Task-number: QTBUT-41335
Change-Id: Id03c4dc8cfbd1b32cc2868fe8b78cd039994ff71
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>

examples/quick/demos/tweetsearch/content/SearchDelegate.qml

@@ -113,7 +113,11 @@ FlipBar {
                 hint: flipBar.placeHolder
                 focus: flipBar.opened
                 anchors { fill: parent; margins: 6 }
-                onAccepted: flipBar.ok()
+                onAccepted: {
+                    if (Qt.inputMethod.visible)
+                        Qt.inputMethod.hide()
+                    flipBar.ok()
+                }
             }
         }
     }