Android: Don't override IContext::widget() unnecessarily

Gets in the way of simplifying IContext handling.

Change-Id: I30961202164062743d9b9ddad34f95b25360f395
Reviewed-by: Jarek Kobus <jaroslaw.kobus@qt.io>
Reviewed-by: Alessandro Portale <alessandro.portale@qt.io>

src/plugins/android/androidmanifesteditor.h

@@ -25,7 +25,6 @@ public:
     explicit AndroidManifestEditor(AndroidManifestEditorWidget *editorWidget);
 
     QWidget *toolBar() override;
-    AndroidManifestEditorWidget *widget() const override;
     Core::IDocument *document() const override;
     TextEditor::TextEditorWidget *textEditor() const;
 
@@ -34,6 +33,7 @@ public:
     void gotoLine(int line, int column = 0, bool centerLine = true)  override;
 
 private:
+    AndroidManifestEditorWidget *ownWidget() const;
     void changeEditorPage(QAction *action);
 
     QString m_displayName;