App includes com.google.android.gms.permission.AD_ID permission

Relevant commit in android-firefox:

• firefox-android@5cb381fe
• firefox-android@31015feb

Referenced Mozilla issues:

• https://github.com/mozilla-mobile/focus-android/issues/7874
• https://github.com/mozilla-mobile/fenix/issues/27458

which reference this support page:

• https://support.google.com/googleplay/android-developer/answer/6048248

It looks like this functionality should have been removed in firefox-android@2e06dbd0

EDIT: this prevents us from publishing on Google play without adding the permission to our app entry in the store.

/cc @pierov @dan