License update - Batch 22

[mossmana]

Updates the license headers for:

1. packages/devtools_app/lib/src/screens/performance/README.md
2. packages/devtools_app/lib/src/screens/performance/panes/controls/enhance_tracing/enhance_tracing.dart
3. packages/devtools_app/lib/src/screens/performance/panes/controls/enhance_tracing/enhance_tracing_controller.dart
4. packages/devtools_app/lib/src/screens/performance/panes/controls/enhance_tracing/enhance_tracing_model.dart
5. packages/devtools_app/lib/src/screens/performance/panes/controls/more_debugging_options.dart
6. packages/devtools_app/lib/src/screens/performance/panes/controls/performance_controls.dart
7. packages/devtools_app/lib/src/screens/performance/panes/controls/performance_settings.dart
8. packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frame_model.dart
9. packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frames_chart.dart
10. packages/devtools_app/lib/src/screens/performance/panes/flutter_frames/flutter_frames_controller.dart
11. packages/devtools_app/lib/src/screens/performance/panes/frame_analysis/frame_analysis.dart
12. packages/devtools_app/lib/src/screens/performance/panes/frame_analysis/frame_analysis_model.dart
13. packages/devtools_app/lib/src/screens/performance/panes/frame_analysis/frame_hints.dart
14. packages/devtools_app/lib/src/screens/performance/panes/frame_analysis/frame_time_visualizer.dart
15. packages/devtools_app/lib/src/screens/performance/panes/rebuild_stats/rebuild_stats.dart
16. packages/devtools_app/lib/src/screens/performance/panes/rebuild_stats/rebuild_stats_controller.dart
17. packages/devtools_app/lib/src/screens/performance/panes/rebuild_stats/rebuild_stats_model.dart
18. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_controller_desktop.dart
19. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_controller_web.dart
20. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_desktop.dart
21. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/_perfetto_web.dart
22. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/perfetto.dart
23. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/perfetto_controller.dart
24. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/perfetto/tracing/model.dart
25. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_event_processor.dart
26. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_events_controller.dart
27. packages/devtools_app/lib/src/screens/performance/panes/timeline_events/timeline_events_view.dart
28. packages/devtools_app/lib/src/screens/performance/performance_controller.dart
29. packages/devtools_app/lib/src/screens/performance/performance_model.dart
30. packages/devtools_app/lib/src/screens/performance/performance_screen.dart
31. packages/devtools_app/lib/src/screens/performance/performance_utils.dart
32. packages/devtools_app/lib/src/screens/performance/tabbed_performance_view.dart
33. packages/devtools_app/test/screens/performance/controls/enhance_tracing_test.dart
34. packages/devtools_app/test/screens/performance/controls/performance_controls_test.dart
35. packages/devtools_app/test/screens/performance/flutter_frames/flutter_frame_model_test.dart
36. packages/devtools_app/test/screens/performance/flutter_frames/flutter_frames_chart_test.dart
37. packages/devtools_app/test/screens/performance/flutter_frames/flutter_frames_controller_test.dart
38. packages/devtools_app/test/screens/performance/frame_analysis/frame_analysis_model_test.dart
39. packages/devtools_app/test/screens/performance/frame_analysis/frame_analysis_test.dart
40. packages/devtools_app/test/screens/performance/frame_analysis/frame_hints_test.dart
41. packages/devtools_app/test/screens/performance/performance_controller_test.dart
42. packages/devtools_app/test/screens/performance/performance_model_test.dart
43. packages/devtools_app/test/screens/performance/performance_screen_test.dart
44. packages/devtools_app/test/screens/performance/rebuild_stats/widget_rebuild_counts_test.dart
45. packages/devtools_app/test/screens/performance/tabbed_performance_view_test.dart
46. packages/devtools_app/test/screens/performance/timeline_events/perfetto/tracing_model_test.dart
47. packages/devtools_app/test/screens/performance/timeline_events/timeline_event_processor_test.dart
48. packages/devtools_app/test/screens/performance/timeline_events/timeline_events_controller_test.dart

#8216

Pre-launch Checklist

• I read the [Contributor Guide] and followed the process outlined there for submitting PRs.
• I read the [Tree Hygiene] wiki page, which explains my responsibilities.
• I read the [Flutter Style Guide] recently, and have followed its advice.
• I signed the [CLA].
• I listed at least one issue that this PR fixes in the description above.
• I updated/added relevant documentation (doc comments with ///).
• I added new tests to check the change I am making, or there is a reason for not adding tests.