Ad notification clicked event is not triggered on iOS

[aseren]

Description:

The clicked event is not sent when opening a notification ad.

Steps to Reproduce

1. Trigger notificaiton ad
2. Tap notification ad

Actual result:

The clicked event is not triggered.

Expected result:

The clicked event is triggered.

Reproduces how often: [Easily reproduced, Intermittent Issue]

Easily reproduced.

Brave Version:

• Can you reproduce this issue with the most recent build from TestFlight?
• Can you reproduce this issue with the previous version of the current build from TestFlight?
• Can you reproduce this issue with the current build from AppStore?

Device details:

Website problems only:

• did you check with Brave Shields down?
• did you check in Safari/Firefox (WkWebView-based browsers)?

Additional Information

[aseren]

cc @iambrianfung @tmancey @tackley