Android: Fix reload prompt on changing settings in the package step

Change-Id: I102a4843652029dff757e12594efc4d5e5e50a99
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@digia.com>

src/plugins/android/androidmanager.cpp

@@ -36,6 +36,7 @@
 #include "androidpackagecreationstep.h"
 #include "androidtoolchain.h"
 
+#include <coreplugin/documentmanager.h>
 #include <projectexplorer/projectexplorer.h>
 #include <projectexplorer/session.h>
 #include <projectexplorer/target.h>
@@ -906,6 +907,7 @@ bool AndroidManager::openManifest(ProjectExplorer::Target *target, QDomDocument
 
 bool AndroidManager::saveManifest(ProjectExplorer::Target *target, QDomDocument &doc)
 {
+    Core::FileChangeBlocker blocker(manifestPath(target).toString());
     return saveXmlFile(target, doc, manifestPath(target));
 }