Blank Project ERR_FILE_NOT_FOUND

**Description:**
When creating a blank cordova project with the latest Ionic cli (6.7.0) and running it on android
the app doesn't load.

**Steps to Reproduce:**
```
ionic start project-name blank --cordova --type=angular
ionic cordova platform add android
ionic cordova build android
```

Then check the chrome console and see:
```
Failed to load resource: net::ERR_FILE_NOT_FOUND /polyfills-es2015.js:1
Failed to load resource: net::ERR_FILE_NOT_FOUND /styles-es2015.js:1
Failed to load resource: net::ERR_FILE_NOT_FOUND cordova.js:1
Failed to load resource: net::ERR_FILE_NOT_FOUND /vendor-es2015.js:1
Failed to load resource: net::ERR_FILE_NOT_FOUND /main-es2015.js:1
Failed to load resource: net::ERR_FILE_NOT_FOUND /assets/icon/favicon.png:1
```

**My `ionic info`:**

```
Ionic:

Ionic CLI : 6.7.0 (/Users/mluz/.npm/_npx/67980/lib/node_modules/@ionic/cli)
Ionic Framework : @ionic/angular 5.1.0
@angular-devkit/build-angular : 0.803.26
@angular-devkit/schematics : 8.3.26
@angular/cli : 8.3.26
@ionic/angular-toolkit : 2.2.0

Cordova:

Cordova CLI : 7.0.1
Cordova Platforms : android 6.2.3
Cordova Plugins : cordova-plugin-ionic-keyboard 2.2.0, cordova-plugin-ionic-webview 4.2.1, (and 4 other plugins)

Utility:

cordova-res : 0.14.0
native-run : 1.0.0

System:

Android SDK Tools : 26.1.1 (/Users/mluz/Library/Android/sdk)
ios-deploy : 1.9.1
ios-sim : 6.0.0
NodeJS : v14.0.0 (/Users/mluz/.nvm/versions/node/v14.0.0/bin/node)
npm : 6.14.4
OS : macOS Mojave
Xcode : Xcode 11.3.1 Build version 11C504
```

Reproduce the failure with the listed Ionic commands, then inspect the generated Android project's web asset paths and the blank Angular project's build output. Done means the blank project launches on Android without the reported ERR_FILE_NOT_FOUND errors for scripts, cordova.js, styles, or the favicon.

Scritto dal modello di indicizzazione a partire dal testo della issue.