bug: card style modal should be rounder when on notch iphones

# Bug Report

**Ionic version:**

[ ] **4.x**
[x] **5.x**

**Current behavior:**
On iOS the Card-Style-Modal does not change while dragging up and down (dismissing)

**Expected behavior:**
Border-Radius should be rounder while dismissing on devices with notch (iPhone X –> iPhone 12)

**Steps to reproduce:**
See native iOS-Apps (like Messages)
or see Video

**Other information:**
Video of **native iOS-App:** https://youtu.be/K01Akn1J9bw
Video of **Ionic-App:** https://youtu.be/dd4-qw0OxQg

_Look at the border-radius of the underlaying element_

**Ionic info:**

```
Ionic:

Ionic CLI : 6.13.1

Utility:

cordova-res : 0.15.3
native-run : not installed

System:

NodeJS : v14.15.4
npm : 7.5.2
OS : macOS Big Sur
```