private Set<String> getDisallowedApps() {
        HashSet<String> disallowedApps = new HashSet<String>();
        disallowedApps.addAll(mDisallowedAppsList);
        disallowedApps.addAll(mVendorDisallowedAppsList);
        return disallowedApps;
    }
Returns if this task should be run on OTA.
This is indicated by the presence of the system apps file.
engine/src/main/java/com/oasisfeng/island/provisioning/task/DeleteNonRequiredAppsTask.java