[iOSKAUpgrade] Update navigation buttons of card details page

This CL switches the left bar button of the credit card details page
from "Cancel" to "Done" when this page is the first one in the
navigation stack. Otherwise, a "Back" button is shown. This change is
intended to fix the confusion that comes with having a "Cancel" button
as the only option to dismiss a view that allows editing (can lead to
thinking that "Cancel" will undo the edits that were made).

This CL also makes the left bar button become "Cancel" whenever the page
enters edit mode. This is done by overriding
SettingsRootTableViewController's `-showCancelDuringEditing`. With this
change, and because the new "Done" button needs to be set after the view
is loaded, the `customLeftBarButtonItem` needs to be re-set in
AutofillCreditCardEditTableViewController so that the left bar button
switches back to "Done" when exiting edit mode.

Navigation buttons before:
https://drive.google.com/file/d/1hy3cZYUMjb3Lcetf6qhYLNtPkMNBehf4/view?usp=sharing&resourcekey=0-DhEUk9hKrMn8jmFaJ3WO3w

Navigation buttons after:
https://drive.google.com/file/d/1xda4aIoh7NYjbMuZJoMun12gLAo0NALb/view?usp=sharing&resourcekey=0-Q5SdP79AQiWGJc6TYtGUBg

Bug: 356822193
Change-Id: I2d4a43ec117159200569f8f753814c90aa48f554
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5834390
Commit-Queue: Noémie St-Onge <noemies@google.com>
Reviewed-by: Tommy Martino <tmartino@chromium.org>
Code-Coverage: findit-for-me@appspot.gserviceaccount.com <findit-for-me@appspot.gserviceaccount.com>
Reviewed-by: Vidhan Jain <vidhanj@google.com>
Cr-Commit-Position: refs/heads/main@{#1352795}
4 files changed
tree: e452d3146860a4e93f38e36b98f4d7f78e8e7c57
  1. android_webview/
  2. apps/
  3. ash/
  4. base/
  5. build/
  6. build_overrides/
  7. buildtools/
  8. cc/
  9. chrome/
  10. chromecast/
  11. chromeos/
  12. codelabs/
  13. components/
  14. content/
  15. crypto/
  16. dbus/
  17. device/
  18. docs/
  19. extensions/
  20. fuchsia_web/
  21. gin/
  22. google_apis/
  23. google_update/
  24. gpu/
  25. headless/
  26. infra/
  27. ios/
  28. ipc/
  29. media/
  30. mojo/
  31. native_client_sdk/
  32. net/
  33. pdf/
  34. ppapi/
  35. printing/
  36. remoting/
  37. rlz/
  38. sandbox/
  39. services/
  40. skia/
  41. sql/
  42. storage/
  43. styleguide/
  44. testing/
  45. third_party/
  46. tools/
  47. ui/
  48. url/
  49. webkit/
  50. .clang-format
  51. .clang-tidy
  52. .clangd
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitallowed
  56. .gitattributes
  57. .gitignore
  58. .gitmodules
  59. .gn
  60. .mailmap
  61. .rustfmt.toml
  62. .vpython3
  63. .yapfignore
  64. ATL_OWNERS
  65. AUTHORS
  66. BUILD.gn
  67. CODE_OF_CONDUCT.md
  68. codereview.settings
  69. CPPLINT.cfg
  70. CRYPTO_OWNERS
  71. DEPS
  72. DIR_METADATA
  73. LICENSE
  74. LICENSE.chromium_os
  75. OWNERS
  76. PRESUBMIT.py
  77. PRESUBMIT_test.py
  78. PRESUBMIT_test_mocks.py
  79. README.md
  80. WATCHLISTS
README.md

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