Error while initializing map on IOS device

## Bug Report
I am getting a crash while running ann app that uses @capacitor/google-maps on a test device (iPhone 8). The app crashes in `Map.enableCurrentLocation` and the error is:
```
Thread 1: Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value
```
Which is caused by `self.mapViewController.GMapView` not being initialized.

### Plugin(s)
@capacitor/google-maps

### Capacitor Version
```
💊 Capacitor Doctor 💊

Latest Dependencies:

@capacitor/cli: 6.1.2
@capacitor/core: 6.1.2
@capacitor/android: 6.1.2
@capacitor/ios: 6.1.2

Installed Dependencies:

@capacitor/cli: 6.1.2
@capacitor/core: 6.1.2
@capacitor/android: 6.1.2
@capacitor/ios: 6.1.2

[success] iOS looking great! 👌
[success] Android looking great! 👌
```

### Platform(s)
IOS

### Current Behavior
Crash on (I am guessing) certain device/ app setup combinations when loading map

### Expected Behavior
Fix

### Code Reproduction
I have debugged the plugin and the issue originates in [Map.getTargetContainer](https://github.com/ionic-team/capacitor-google-maps/blob/main/plugin/ios/Plugin/Map.swift#L172)

```
private func getTargetContainer(refWidth: Double, refHeight: Double) -> UIView? {
if let bridge = self.delegate.bridge {
for item in bridge.webView!.getAllSubViews() {
let isScrollView = item.isKind(of: NSClassFromString("WKChildScrollView")!) || item.isKind(of: NSClassFromString("WKScrollView")!)
let isBridgeScrollView = item.isEqual(bridge.webView?.scrollView)

if isScrollView && !isBridgeScrollView {
(item as? UIScrollView)?.isScrollEnabled = true

let height = Double((item as? UIScrollView)?.contentSize.height ?? 0)
let width = Double((item as? UIScrollView)?.contentSize.width ?? 0)
let actualHeight = round(height / 2)

let isWidthEqual = width == self.config.width
let isHeightEqual = actualHeight == self.config.height

if isWidthEqual && isHeightEqual && item.tag < self.targetViewController?.tag ?? Map.MAP_TAG {
return item
}
}
}
}

return nil
}
```
In the function above isHeightEqual is always false. In the case of the 'correct' view it is off by one (367.0 <> 366.0) which, I am guessing has to do with the specific dimensions of my device and some rounding error.

This works for me:
```
let tolerance = 1.0
let isWidthEqual = abs(width - self.config.width) <= tolerance
let isHeightEqual = abs(actualHeight - self.config.height) <= tolerance

if isWidthEqual && isHeightEqual && item.tag < self.targetViewController?.tag ?? Map.MAP_TAG {
return item
}
```