private static IInputMethodManager getIInputMethodManager() {
        IBinder b = ServiceManager.getService(Context.INPUT_METHOD_SERVICE);
        return IInputMethodManager.Stub.asInterface(b);
    }
Runs the next task when all packages have been deleted or shuts down the activity if package
deletion fails.
engine/src/main/java/com/oasisfeng/island/provisioning/task/DeleteNonRequiredAppsTask.java