Add iPhone 16 identifier

To address the failure in https://ci.chromium.org/ui/p/flutter/builders/try/Mac_ios%20animated_advanced_blend_perf_ios__timeline_summary/48/overview

Change-Id: Ie3c4bbc1d37dbfc47f5777ff2aee758953f1a3db
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/64580
Commit-Queue: Zach Anderson <zra@google.com>
Reviewed-by: Victoria Ashworth <vashworth@google.com>

recipe_modules/test_utils/api.py

diff --git a/recipe_modules/test_utils/api.py b/recipe_modules/test_utils/api.py
index 26b0926..09bd452 100644
--- a/recipe_modules/test_utils/api.py
+++ b/recipe_modules/test_utils/api.py
@@ -61,6 +61,7 @@
     'iPhone14,5': 'iPhone 13',
     'iPhone14,2': 'iPhone 13 Pro',
     'iPhone14,3': 'iPhone 13 Pro Max',
+    'iPhone17,3': 'iPhone 16 Pro',
 }
 
 # Regexp for windows os version number