[fenix] Update the Lifecycle dependency to 2.2.0-rc02 (https://github.com/mozilla-mobile/fenix/pull/6780)

The changelog [lives here](https://developer.android.com/jetpack/androidx/releases/lifecyclehttps://github.com/mozilla-mobile/fenix/pull/2.2.0-rc02).
This is another attempt to fix the oddities being detected by
Glean in Fenix: 'baseline' ping are not being sent for a certain
subset of users, 'metrics' pings are.

buildSrc/src/main/java/Dependencies.kt

@@ -24,7 +24,7 @@ object Versions {
     const val androidx_preference = "1.1.0"
     const val androidx_legacy = "1.0.0"
     const val androidx_annotation = "1.1.0"
-    const val androidx_lifecycle = "2.2.0-beta01"
+    const val androidx_lifecycle = "2.2.0-rc02"
     const val androidx_fragment = "1.2.0-beta02"
     const val androidx_navigation = "2.2.0-beta01"
     const val androidx_recyclerview = "1.1.0-beta04"