How to get instant changes in background from private api in mobile app?

function Foo() {
  // private vars
  var parameters; 

  // public methods
  this.setParam = function(_params) {
    parameters = _params;
  };

  this.save = function() {
    // save parameters
  }
}

var foo1 = new Foo();
var foo2 = new Foo();

foo1.setParams( hugeObject );
foo1.save();

Task<ShortDynamicLink> shortLinkTask = FirebaseDynamicLinks.getInstance().createDynamicLink()
        .setLongLink(Uri.parse("https://example.page.link/?link=https://www.example.com/&apn=com.example.android&ibn=com.example.ios"))
        .buildShortDynamicLink()
        .addOnCompleteListener(this, new OnCompleteListener<ShortDynamicLink>() {
            @Override
            public void onComplete(@NonNull Task<ShortDynamicLink> task) {
                if (task.isSuccessful()) {
                    // Short link created
                    Uri shortLink = task.getResult().getShortLink();
                    Uri flowchartLink = task.getResult().getPreviewLink();
                } else {
                    // Error
                    // ...
                }
            }
        });

public class DynamicLinkBuilder {

    private String dynamicLink = "https://example.com/foo"

    public DynamicLinkBuilder(String link) {
        this.dynamicLink += "?link=" + link;
    }

    public DynamicLinkBuilder addMinVersion(int minVersion){
        dynamicLink += "&amv=" + minVersion;
        return this;
    }

    public DynamicLinkBuilder addIosUrl(String iosUrl){
        dynamicLink += "&ifl=" + iosUrl;
        return this;
    }

    public DynamicLinkBuilder addDesktopUrl(String desktopUrl){
        dynamicLink += "&ofl=" + desktopUrl;
        return this;
    }

    public DynamicLinkBuilder addFallbackUrl(String fallbackUrl){
        dynamicLink += "&afl=" + fallbackUrl;
        return this;
    }

    public DynamicLinkBuilder addPackageName(String packageName){
        dynamicLink += "&apn=" + packageName;
        return this;
    }

    public DynamicLinkBuilder addSocialMediaLogo(String logoUrl){
        dynamicLink += "&si=" + logoUrl;
        return this;
    }

    public DynamicLinkBuilder addSocialMediaTitle(String title){
        dynamicLink += "&st=" + Uri.encode(title);
        return this;
    }

    public DynamicLinkBuilder addSocialMediaDescription(String description){
        dynamicLink += "&sd=" + Uri.encode(description);
        return this;
    }

    public String build(){
        return dynamicLink;
    }
}

@NonNull
private static Intent getDetailActivityStartIntent(Context context,
                                                   int position,
                                                   PhotoViewHolder holder) {
    final Intent intent = new Intent(Intent.ACTION_VIEW,
            Uri.parse("https://multi-feature.instantappsample.com/detail/" + position));
    intent.setPackage(context.getPackageName());
    intent.addCategory(Intent.CATEGORY_BROWSABLE);

    TextView author =
            holder.itemView.findViewById(com.example.android.unsplash.base.R.id.author);

    // Working around unboxing issues with multiple dex files on platforms prior to N.
    intent.putExtra(IntentUtil.SELECTED_ITEM_POSITION, position);
    intent.putExtra(IntentUtil.FONT_SIZE, author.getTextSize());
    intent.putExtra(IntentUtil.PADDING,
            new Rect(author.getPaddingLeft(),
                    author.getPaddingTop(),
                    author.getPaddingRight(),
                    author.getPaddingBottom()));
    intent.putExtra(IntentUtil.TEXT_COLOR, author.getCurrentTextColor());
    return intent;
}

final Intent intent = getDetailActivityStartIntent(activity, position, pvh);
final ActivityOptions activityOptions = getActivityOptions(pvh);
activity.startActivityForResult(intent, IntentUtil.REQUEST_CODE, 
    activityOptions.toBundle());