Merge "findNetworkStackApk returns an array of files (2/n)" into rvc-dev

    private static final TestApp NETWORK_STACK = new TestApp("NetworkStack",

            getNetworkStackPackageName(), -1, false, findNetworkStackApk());

    private static File findNetworkStackApk() {

    private static File[] findNetworkStackApk() {

        for (String name : NETWORK_STACK_APK_NAMES) {

            final File apk = new File("/system/priv-app/" + name + "/" + name + ".apk");

            if (apk.isFile()) {

                return apk;

                final File dir = new File("/system/priv-app/" + name);

                return dir.listFiles((d, f) -> f.startsWith(name));

            }

        }

        throw new RuntimeException("Can't find NetworkStackApk");