[iOS] Price Tracking Accessibility Bugs

The price tracking feature was discovered to have three accessibility
bugs. First, the heading text at the top of the Price Tracking Table
View was being labeled as a header by the iOS screen reader. Second, the
link that is embedded into the Trackable Section's subtitle was not
clickable via the screen reader. Lastly, the price drop label was not
being properly read by the screen reader.

In this CL, the first two issues stemmed from the fact that the
TableViewTextHeaderItem class was treating its header and subtitle
labels as one UIAccessibilityElement. The solution was to break up
each label into its own accessibility element. This solution also
worked to remedy the third issue.

Bug: 1427172
Change-Id: Idb153c376c6fc2a9691b5932e2cca4a5011fc258
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4366925
Commit-Queue: Daniel White <danieltwhite@google.com>
Reviewed-by: Gauthier Ambard <gambard@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1121713}
6 files changed
tree: 91b61f1a267d4731dbb1c056eb3c225d15a45d60
  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. courgette/
  16. crypto/
  17. dbus/
  18. device/
  19. docs/
  20. extensions/
  21. fuchsia_web/
  22. gin/
  23. google_apis/
  24. google_update/
  25. gpu/
  26. headless/
  27. infra/
  28. ios/
  29. ipc/
  30. media/
  31. mojo/
  32. native_client_sdk/
  33. net/
  34. pdf/
  35. ppapi/
  36. printing/
  37. remoting/
  38. rlz/
  39. sandbox/
  40. services/
  41. skia/
  42. sql/
  43. storage/
  44. styleguide/
  45. testing/
  46. third_party/
  47. tools/
  48. ui/
  49. url/
  50. weblayer/
  51. .clang-format
  52. .clang-tidy
  53. .eslintrc.js
  54. .git-blame-ignore-revs
  55. .gitattributes
  56. .gitignore
  57. .gn
  58. .mailmap
  59. .rustfmt.toml
  60. .vpython3
  61. .yapfignore
  62. ATL_OWNERS
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  69. LICENSE
  70. LICENSE.chromium_os
  71. OWNERS
  72. PRESUBMIT.py
  73. PRESUBMIT_test.py
  74. PRESUBMIT_test_mocks.py
  75. README.md
  76. WATCHLISTS
README.md

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