public boolean bindSessionToPostMessageService(Context context, String packageName) {
        Intent intent = new Intent();
        intent.setClassName(packageName, PostMessageService.class.getName());
        boolean success = context.bindService(intent, this, Context.BIND_AUTO_CREATE);
        if (!success) {
            Log.w(TAG, "Could not bind to PostMessageService in client.");
        }
        return success;
    }
Binds the browser side to the client app through the given {@link PostMessageService} name.
After this, this {@link PostMessageServiceConnection} can be used for sending postMessage
related communication back to the client.
@param context A context to bind to the service.
@param packageName The name of the package to be bound to.
@return Whether the binding was successful.
customtabs/src/android/support/customtabs/PostMessageServiceConnection.java