firebase-ios-sdk

Support in-app messaging on tvOS apps (#7160)

* Unlock tvOS for in-app messaging. Podspec needs refactoring

* Remove trailing whitespace

* Remove trailing whitespace

* Fix whitespace

* Add tvOS tests to GHA

* Add TARGET_OS_TV to endifs. Get rid of another pre iOS10 URL open check

* Fix yml for GHA

* Don't build default UI sample app on tvOS

* Better logging for nil message display component in tvOS

* Silence archiving deprecation warnings

* Lower tvOS support target