Update Samples for 3.16 (#2085)

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or adding, and why. Consider including before/after screenshots.*

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## Pre-launch Checklist

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platform_design/codelab_rebuild.yaml

@@ -8,9 +8,6 @@ steps:
       - web
   - name: Flutter recreate runner
     flutter: create --platform android,ios,web --org dev.flutter .
-  - name: Strip DEVELOPMENT_TEAM
-    strip-lines-containing: DEVELOPMENT_TEAM =
-    path: ios/Runner.xcodeproj/project.pbxproj
   - name: Patch web/manifest.json
     path: web/manifest.json
     patch-u: |