Base64 Encoded Icon cannot read property width of undefined

**I'm submitting a ...** (check one with "x")
- [ ] question
- [x ] any problem or bug report
- [ ] feature request

**If you choose 'problem or bug report', please select OS:** (check one with "x")
- [x ] **Android**
- [ ] **iOS**
- [ ] **Browser**

**cordova information:** (run `$> cordova plugin list`)

```
TypeError: Cannot read property 'width' of undefined
zone.js:690
message:"Cannot read property 'width' of undefined"
stack:"TypeError: Cannot read property 'width' of undefined
at Map. (http://localhost/plugins/cordova-plugin-googlemaps/www/Map.js:1487:63)
at http://localhost/plugins/cordova-plugin-googlemaps/www/commandQueueExecutor.js:63:21
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invoke (http://localhost/polyfills.js:3492:30)
at Zone.push../node_modules/zone.js/dist/zone.js.Zone.run (http://localhost/polyfills.js:3249:47)
at http://localhost/polyfills.js:3997:38
at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (http://localhost/polyfills.js:3527:35)
at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (http://localhost/polyfills.js:3294:51)
at drainMicroTaskQueue (http://localhost/polyfills.js:3707:39)"

**If you use `@ionic-native/google-maps`, please tell the package.json (only `@ionic-native/core` and `@ionic-native/google-maps` are fine mostly)**
"@ionic-native/core": "^5.28.0",
"@ionic-native/device": "^5.28.0",
"cordova-android": "^8.1.0",
"cordova-androidx-build": "^1.0.4",
"@ionic-native/google-maps": "^5.27.0-beta-20200630",
"cordova-plugin-googlemaps": "git+https://github.com/mapsplugin/cordova-plugin-googlemaps.git#multiple_maps",
```

**Current behavior:**

Adding a marker using Base64 format produces an error. The marker is shown on the map as expected but the error mentioned above is produced.

**Expected behavior:**

The marker should be draw on the map with out producing error.

**Screen capture or video record:**

**Related code, data or error log (please format your code or data):**

```
loadMap() {

// This code is necessary for browser
Environment.setEnv({
'API_KEY_FOR_BROWSER_RELEASE': '(your api key for `https://`)',
'API_KEY_FOR_BROWSER_DEBUG': '(your api key for `http://`)'
});

let mapOptions: GoogleMapOptions = {
camera: {
target: {
lat: 43.0741904,
lng: -89.3809802
},
zoom: 18,
tilt: 30
}
};

this.map = GoogleMaps.create('map_canvas', mapOptions);
// let icon='blue';
let icon= 'data:image/png;base64,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';
let marker: Marker = this.map.addMarkerSync({
title: 'Ionic',
icon: icon,
animation: 'DROP',
position: {
lat: 43.0741904,
lng: -89.3809802
}
});
marker.on(GoogleMapsEvent.MARKER_CLICK).subscribe(() => {
alert('clicked');
});
}
}`
```