Add prototype of Google AdMob ads

[nilsreichardt]

Description

This pull request adds Google AdMob for displaying ads in Sharezone. It's an experiment that we will run in the next weeks. Because we set the tagForUnderAgeOfConsent to true, we don't need to show a consent dialog because only "limited ads" will be displayed.

Use the activation code "ads" to enable ads.

Demo

Dashboard	Timetable	Homework	Info Screen

Additionally, we show after every fifth homework check a full-screen ad:

Screen.Recording.2024-10-14.at.16.46.09.mov

[github-actions]

Visit the preview URL for this PR (updated for commit 36131ef):

https://sharezone-test--pr1760-ads-6jxj6bxu.web.app

_{(expires Thu, 17 Oct 2024 23:12:39 GMT)}

_{🔥 via Firebase Hosting GitHub Action 🌎}

_{Sign: 4cb3ae61e1e018abfd9841fd3239f5b49ccc034b}

[Sharezone-Admin]

⬇️ Builds generated by Codemagic for commit 36131ef ⬇️

Note: Only Sharezone team members are able to install the iOS app.

iOS		Android
Download link		Download link

_{(expires Wed, 13 Nov 2024 23:24:42 GMT)
Codemagic build: 670da49eda0827f98a72a04c; comment generated with Codemagic App Preview}

[Jonas-Sander]

For me the ads are not activated after using the code "ads" from the apk of the app-preview.

[Jonas-Sander]

Additionally, we show after every fifth editing/adding homework a full-screen ad:

I thought we wanted to show it after completing a homework? I'm not sure I like it after editing/adding a homework.

[nilsreichardt]

I thought we wanted to show it after completing a homework? I'm not sure I like it after editing/adding a homework.

Yes, I just added to editing/adding a homework because I thought adding it to completing a homework would be harder to add. But it wasn't that complicated - so I replaced it as we discussed 👍

[Jonas-Sander]

They are still not shown on my device, but LGTM