Force uninstall of any Qt apps that are using Qt < 5.4

On Qt 5.4 the problem was fixed by
https://codereview.qt-project.org/#/c/91261/

Change-Id: Id139fe2fe1e83ac5108ffeeb140cb8d2f16747c7
Reviewed-by: Daniel Teske <daniel.teske@digia.com>

src/plugins/android/androiddeployqtstep.h

@@ -69,6 +69,12 @@ class AndroidDeployQtStep : public ProjectExplorer::AbstractProcessStep
 {
     Q_OBJECT
     friend class AndroidDeployQtStepFactory;
+public:
+    enum UninstallType {
+        Keep,
+        Uninstall,
+        ForceUnintall
+    };
 public:
     AndroidDeployQtStep(ProjectExplorer::BuildStepList *bc);
 
@@ -77,7 +83,7 @@ public:
 
     bool runInGuiThread() const;
 
-    bool uninstallPreviousPackage();
+    UninstallType uninstallPreviousPackage();
 
 public slots:
     void setUninstallPreviousPackage(bool uninstall);