import android.content.pm.ApplicationInfo;

if ((ApplicationInfo.FLAG_SYSTEM & myApplicationInfo.flags) != 0)
   // It is a pre embedded application on the device.

private String getAllPreInstalledApplications() {

        String allPreInstalledApplications = "";

        PackageManager pm = getPackageManager();
        List<ApplicationInfo> installedApplications = pm
                .getInstalledApplications(PackageManager.GET_META_DATA);

        for (ApplicationInfo applicationInfo : installedApplications) {
            if (isApplicationPreInstalled(applicationInfo)) {
                allPreInstalledApplications += applicationInfo.processName + "n";
            }
        }

        return allPreInstalledApplications;
}
private static boolean isApplicationPreInstalled(ApplicationInfo applicationInfo) {
    if (applicationInfo != null) {
        int allTheFlagsInHex = Integer.valueOf(
                String.valueOf(applicationInfo.flags), 16);
        /*
         If flags is an uneven number, then it
         is a preinstalled application, because in that case
         ApplicationInfo.FLAG_SYSTEM ( == 0x00000001 )
         is added to flags
          */
        if ((allTheFlagsInHex % 2) != 0) {
            return true;
        }
    }
    return false;
}