Recreating PR #5966
Instead of using firebasedynamiclinks-ipv4.googleapis.com and firebasedynamiclinks-ipv6.googleapis.com for doing attribution calls, we are moving towards using firebasedynamiclinks.googleapis.com.
Fixes#5032
-changed ipv4 and ipv6 attribution calls with a single direct url.
-Removed and refactored code to get rid of code to handle consolidated results from ipv4 and ipv6 result.
-Made changes to Test app to show alert dialog when universal linking when app is not in background case and also for fresh start case.
* Get the FDL app running with the new provisioning profile, entitlements and info.plist entries.
* Minor: Add newline at end of file.
* Minor: Add newline.
* Minor: Update style.
* Update copyright notices.
* Handle continueUserActivity in the scene delegate.
* Update copyright notice year.