Can't get version from JS on initial install

[fermuch]

Steps to reproduce:

• Clone the repo
• Execute the Example in a device or an emulator (Android)
• Version is undefined.

After updating the app for the first time, the correct version is displayed.

Screenshot:

[maarekj]

Change the body of function getJSBundleFile() in class "MainApplication" with the following code:

    @Nullable
    @Override
    protected String getJSBundleFile() {
        ReactNativeAutoUpdater updater = ReactNativeAutoUpdater.getInstance(getApplicationContext());
        updater.setMetadataAssetName("metadata.android.json");
        return updater.getLatestJSCodeLocation();
    }