[ANDROID][BUGFIX][ADMOB] Fix Admob crash from UnityAds with Admob Mediation

[wasedaigo]

Fixes #1792

Summary

There is a problem that UnityAds does not work with Admob Mediation.
It seems some mediation adapters such as UnityAds, adcolony, appodeal require ActivityContext.
This PR fixes the issue.

Checklist

• [ x] Supports Android

• Supports iOS

• e2e tests added or updated in /tests/e2e/*

• Updated the documentation in the docs repo

  • LINK TO DOCS PR HERE

• Flow types updated

• Typescript types updated

Test Plan

My fork is already released for my games in production.
I started seeing getting a traffic to UnityAds via AdmobMediation which used to be zero.
So far I am not seeing any obvious bug due to this change, but I have no idea how to make sure this change won't introduce any regression.

Release Plan

[ANDROID][BUGFIX][ADMOB] - Fixed an issue UnityAds wasn't working with Admob Mediation due to the lack of ActivityContext

[wasedaigo]

Blocked due to plan-no-credits-available Please purchase a new credit block then push a new commit or call the API to run a new build.

Are we running out of money to run circleCI ??

[Salakar]

Are we running out of money to run circleCI ??

We have 😭 I'll sort for next week!

[wasedaigo]

aaahhhh okay..! Thanks for your quick response!

[wasedaigo]

can we rerun circleCI?

[mikehardy]

Hi there! I'm helping maintain the v5 branch along with @Salakar and I believe we have CI all sorted and tests green etc so the v5 branch can tolerate change now. If you rebase to current v5.x.x and push this again, I can check into it and try to get it merged for you. @wasedaigo what do you think?

[mikehardy]

I was able to rebase via github UI so I'll check into this once CI check goes green

[mikehardy]

This will be in the next 5.4.x release - thanks!