Fixed Firebase Messaging build issues in `FIRMessaging.m` and `FIRMessagingContextManagerService.m` when targeting visionOS. Also cleaned up extraneous `@availability` checks for platforms below the current minimum deployment target in these files.
* Revert "Prevent firelog from logging invalid data (#8443)"
This reverts commit 7fc7325fa6.
* Revert "Update changelog (#8440)"
This reverts commit ecc7d6da15.
* Revert " Adding a new API that allows iOS users to log notification delivery signal that exports to BigQuery. (#6181)"
This reverts commit ce87d25bda.
* remove ios 8 related check as our sdk minimum support is iOS 9 now;
* update changelog
* remove FIRInstanceIDURLQueryItem
* move appid to constant class
* update changelog
* fix clang format and typo in changelog
Andrew Heard