bug: platform events not triggering change detection

[mebibou]

Bug Report

Ionic version:

[x] 4.x

Current behavior:
Related to #18342, I just had the same issue today, and imho this is definitely a bug related to ionic with angular, since platform comes from:

import { Platform } from '@ionic/angular';

Expected behavior:
Since platform.resume type of events come from the @ionic/angular package, I would expect them to be wrapped in a zone so that not everyone has to wrap it themselves.

Especially since platform.ready() is wrapped in a zone, I really don't see why platform.resume should not.

Steps to reproduce:
Have some view that changes when the app resumes.

Related code:

<ion-content>
  <span *ngIf="resumed">App is resumed</span>
</ion-content>

class Component {
  resumed = false;
  
  constructor(
    platform: Platform
  ) {
    platform.resume.subscribe(() => this.resumed = true);
  }
}

Other information:

Ionic info:

Ionic:

   Ionic CLI                     : 5.2.3 (/.nvm/versions/node/v12.5.0/lib/node_modules/ionic)
   Ionic Framework               : @ionic/angular 4.6.2
   @angular-devkit/build-angular : 0.13.9
   @angular-devkit/schematics    : 7.3.9
   @angular/cli                  : 7.3.9
   @ionic/angular-toolkit        : 1.5.1

Cordova:

   Cordova CLI       : 9.0.0 (cordova-lib@9.0.1)
   Cordova Platforms : ios 5.0.1
   Cordova Plugins   : cordova-plugin-ionic 5.3.1, cordova-plugin-ionic-keyboard 2.1.3, cordova-plugin-ionic-webview 4.1.1, (and 10 other plugins)

Utility:

   cordova-res : 0.6.0 
   native-run  : 0.2.5 (update available: 0.2.8)

System:

   Android SDK Tools : 26.1.1 (/usr/local/Cellar/android-sdk/24.4.1_1)
   ios-deploy        : 1.9.2
   ios-sim           : 8.0.1
   NodeJS            : v12.5.0 (/.nvm/versions/node/v12.5.0/bin/node)
   npm               : 6.10.1
   OS                : macOS Mojave
   Xcode             : Xcode 10.2.1 Build version 10E1001

[ionitron-bot]

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