Attempt to fix the every flakey app lock setup test

We noticed that confirming the PIN will automatically hide the keyboard which makes the whole screen shift down while attempting to press the allow button. We also see an `App animations complete notification not received, will attempt to continue.` warning which seems to point to the same issue.

UITests/Sources/AppLockSetupUITests.swift

@@ -44,10 +44,17 @@ class AppLockSetupUITests: XCTestCase {
 
         enterPIN()
 
+        // This test has been especially flakey. We noticed that confirming the PIN will
+        // automatically hide the keyboard which makes the whole screen shift down while
+        // attempting to press the allow button. We also see an `App animations complete
+        // notification not received, will attempt to continue.` warning which seems to
+        // point to the same issue.
+        try await Task.sleep(for: .seconds(1.0))
+
         // Setup biometrics screen.
         try await app.assertScreenshot(.appLockSetupFlow, step: Step.setupBiometrics)
 
-        app.buttons[A11yIdentifiers.appLockSetupBiometricsScreen.allow].tap()
+        app.buttons[A11yIdentifiers.appLockSetupBiometricsScreen.allow].tapCenter()
 
         // Settings screen.
         try await app.assertScreenshot(.appLockSetupFlow, step: Step.settings)