chore(auth): fix web authn and push notifications integration tests

[thisisabhash]

Issue #

Failing WebAuthN and Push Notification Integration tests

Description

Fixes three failing integration tests on CI caused by the Xcode 26.3 / watchOS 26.2 upgrade and the aws-sdk-swift 1.7.27 bump.

Changes

1. AuthWebAuthnApp — fix flaky system dialog detection

The test previously checked for an API error (1s timeout) and the system Continue button (6s timeout) as two separate sequential steps. If the Cognito startWebAuthnRegistration call was slow or transiently failed after the 1s window, the test would proceed to wait for a button that would never appear.

Restructured to wait for the ASAuthorizationControllerContinueButton directly inside the attempt retry loop (30s per attempt, up to 3 retries). This handles both slow network responses and transient API failures in a single pass.

2. PushNotificationsWatchApp / AnalyticsWatchApp — fix simulator installation on watchOS 26.2

Both standalone watch app targets had SKIP_INSTALL = YES. In Xcode 26.3, this prevents WKWatchOnly apps from being installed on the watchOS 26.2 simulator, causing FBSApplicationLibrary to return nil when the test runner attempts to launch them. Changed to SKIP_INSTALL = NO.

Files changed

• AmplifyPlugins/Auth/Tests/AuthWebAuthnApp/AuthWebAuthnAppUITests/AuthWebAuthnAppUITests.swift
• AmplifyPlugins/Analytics/Tests/AnalyticsHostApp/AnalyticsHostApp.xcodeproj/project.pbxproj
• AmplifyPlugins/Notifications/Push/Tests/PushNotificationHostApp/PushNotificationHostApp.xcodeproj/project.pbxproj

Test plan

• AuthWebAuthnApp UI test passes on iOS 18.5 (Xcode 16.4)
• PushNotificationWatchTests passes on watchOS 26.2 (Xcode 26.3)
• AnalyticsWatchApp tests pass on watchOS 26.2 (Xcode 26.3)
• No regressions on iOS/tvOS integration tests

Test plan

• AuthWebAuthnApp integration test passes on iOS 18.5 (Xcode 16.4)
• PushNotificationWatchTests integration test passes on watchOS 26.2 (Xcode 26.3)
• No regressions on iOS/tvOS push notification tests

General Checklist

• Added new tests to cover change, if needed
• Build succeeds with all target using Swift Package Manager
• All unit tests pass
• All integration tests pass
• Security oriented best practices and standards are followed (e.g. using input sanitization, principle of least privilege, etc)
• Documentation update for the change if required
• PR title conforms to conventional commit style
• New or updated tests include Given When Then inline code documentation and are named accordingly testThing_condition_expectation()
• If breaking change, documentation/changelog update with migration instructions

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 66.74%. Comparing base (7cc49bc) to head (1b74195).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4241      +/-   ##
==========================================
- Coverage   66.95%   66.74%   -0.21%     
==========================================
  Files        1151     1151              
  Lines       43869    43869              
==========================================
- Hits        29372    29280      -92     
- Misses      14497    14589      +92     

Flag	Coverage Δ
API_plugin_unit_test	68.33% <ø> (+0.17%)	⬆️
AWSPluginsCore	68.07% <ø> (ø)
Amplify	47.47% <ø> (ø)
Amplify_Foundation_Bridge_unit_test	62.28% <ø> (ø)
Amplify_Foundation_unit_test	67.64% <ø> (ø)
Analytics_plugin_unit_test	83.43% <ø> (ø)
Auth_plugin_unit_test	72.36% <ø> (-0.17%)	⬇️
DataStore_plugin_unit_test	81.75% <ø> (-1.04%)	⬇️
Firehose_plugin_unit_test	53.15% <ø> (ø)
Geo_plugin_unit_test	73.39% <ø> (ø)
Kinesis_plugin_unit_test	52.17% <ø> (ø)
Logging_plugin_unit_test	64.86% <ø> (ø)
Predictions_plugin_unit_test	33.89% <ø> (ø)
PushNotifications_plugin_unit_test	85.66% <ø> (ø)
RecordCache_unit_test	76.40% <ø> (ø)
Storage_plugin_unit_test	78.67% <ø> (-0.03%)	⬇️
unit_tests	66.74% <ø> (-0.21%)	⬇️

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