iOS banner advertisement at bottom of screen floats and covers bottom page content

**Describe the bug**
When showing a banner on iOS at the bottom using the code from the README.MD:

```js
async initializeAds(): Promise {
const { status } = await AdMob.trackingAuthorizationStatus();

await AdMob.initialize({
initializeForTesting: true,
});

const options: BannerAdOptions = {
adId: 'ca-app-pub-xxxxxxxxx/xxx',
adSize: BannerAdSize.ADAPTIVE_BANNER,
position: BannerAdPosition.BOTTOM_CENTER,
margin: 0,
isTesting: true,
// npa: true
};
await AdMob.showBanner(options);
}
```

It covers the bottom content of the webpage

On Android the same code works fine and the banner is positioned below the scrollable content area:


It looks like this is related to:
- https://github.com/capacitor-community/admob/issues/191 (got no reply)
- https://github.com/capacitor-community/admob/issues/160 (open, fix merged)
- https://github.com/capacitor-community/admob/issues/33 (closed)

Sites mentioning this issue as well:
- https://www.reddit.com/r/ionic/comments/zyintl/how_do_i_fix_a_capacitor_community_admob_banner/

If seems that https://github.com/capacitor-community/admob/issues/33#issuecomment-708982270 this code piece fixes the issue, but can't imagine this is the preferred way to do so.

**To Reproduce**
- Create a new Ionic app for example the sidemenu template
- Add this AdMob plugin as specified in the README.MD

**Expected behavior**
I expect the banner to be below the scrollable area on iOS. This allows buttons on the bottom to be tappable

**Smartphone (please complete the following information):**
- Device: iPhone 13 Pro Max
- OS: iOS 16.6

Start with the README.MD banner setup using AdMob.showBanner and reproduce it in an Ionic sidemenu app on iOS 16.6, comparing the iOS behavior with Android. The work is done when a bottom banner no longer covers scrollable content or bottom buttons and remains positioned below the usable content area.

Written by the indexing model from the issue text.