Application executable displays the wrong icon

# Bug Report

## Problem

### What is expected to happen?

When `target=app` and `target=installer` icons both are configured, installer file should display `target=installer` icon and installed application executable file should have `target=app` icon

### What does actually happen?

Currently, `target=app` icon is only visible in the title bar and application executable shows `target=installer` icon

## Information

I tried the officially documented way of configuring icons and I also tried copying necessary icons to build resources folder myself but neither way worked.

### Command or Code

### Environment, Platform, Device

Building and running on Windows 10

### Version information

Windows 10 Pro 1903
Cordova: 9.0.0
Cordova-electron: 1.1.0
Ionic: 3.9.2

## Checklist

- [x] I searched for existing GitHub issues
- [x] I updated all Cordova tooling to most recent version
- [x] I included all the necessary information above

Reproduce the issue on Windows 10 using separate target=app and target=installer icons, following the documented configuration and checking the build resources. Trace the application and installer icon entry points to determine where the executable receives its icon. Done means the installer displays the installer icon while the installed application executable displays the app icon.

Written by the indexing model from the issue text.