Cherry-pick Analytics PR and update versions and release notes for 8.1.1 (#8235) (#8241)

Author: paulb777

Firebase.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'Firebase'
-  s.version          = '8.1.0'
+  s.version          = '8.1.1'
   s.summary          = 'Firebase'
 
   s.description      = <<-DESC

FirebaseCore/CHANGELOG.md

@@ -2,6 +2,10 @@
 - [fixed] Stop flooding Swift Package Manager projects with Firebase test schemes. (#8167)
 - [fixed] Removed "Invalid Exclude" warnings for Swift Package Manager using Xcode 13 beta 1.
 
+# Firebase 8.1.1
+- [fixed] Fixed an issue where apps were getting rejected for a formerly-public method name
+  removed in iOS 15. Only FirebaseAnalytics is updated for this release. (#8222)
+
 # Firebase 8.0.0
 - [removed] The deprecated Firebase InstanceID has been removed. Use Firebase Installations to manage
   app instance and use Firebase Messaging to manage FCM registration token instead. (#7970)

Package.swift

@@ -17,7 +17,7 @@
 
 import PackageDescription
 
-let firebaseVersion = "8.1.0"
+let firebaseVersion = "8.1.1"
 
 let package = Package(
   name: "Firebase",