[CrOSCellular] Add wait for Cellular Device in CellularPolicyHandler

eSIM provisioning via policy fails sometimes because the cellular
modem is not ready and Cellular device state is not available. This
is reproduced by setting policy on admin console while the device is
turned off. This causes eSIM installation immediately on boot when
device state is not yet ready.

This CL fixes this by adding an additional wait for Cellular device
state in CellularPolicyHandler so that policy installations are not
attempted until a cellular device state is available.

TEST: Manually verified that eSIM install on boot doesn't fail on first
attempt. Unit-test case was added to cover this.

Fixed: b/219989350
Change-Id: I177976173956ac923750557cf4d81b62dcfc0a47
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3500984
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Reviewed-by: Jason Zhang <jiajunz@google.com>
Commit-Queue: Azeem Arshad <azeemarshad@chromium.org>
Cr-Commit-Position: refs/heads/main@{#981773}
5 files changed
tree: 0145216252a902707017855327ca630ef4bf7439
  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. cloud_print/
  13. codelabs/
  14. components/
  15. content/
  16. courgette/
  17. crypto/
  18. dbus/
  19. device/
  20. docs/
  21. extensions/
  22. fuchsia/
  23. gin/
  24. google_apis/
  25. google_update/
  26. gpu/
  27. headless/
  28. infra/
  29. ios/
  30. ipc/
  31. media/
  32. mojo/
  33. native_client_sdk/
  34. net/
  35. pdf/
  36. ppapi/
  37. printing/
  38. remoting/
  39. rlz/
  40. sandbox/
  41. services/
  42. skia/
  43. sql/
  44. storage/
  45. styleguide/
  46. testing/
  47. third_party/
  48. tools/
  49. ui/
  50. url/
  51. weblayer/
  52. .clang-format
  53. .clang-tidy
  54. .eslintrc.js
  55. .git-blame-ignore-revs
  56. .gitattributes
  57. .gitignore
  58. .gn
  59. .mailmap
  60. .rustfmt.toml
  61. .vpython
  62. .vpython3
  63. .yapfignore
  64. AUTHORS
  65. BUILD.gn
  66. CODE_OF_CONDUCT.md
  67. codereview.settings
  68. DEPS
  69. DIR_METADATA
  70. ENG_REVIEW_OWNERS
  71. LICENSE
  72. LICENSE.chromium_os
  73. OWNERS
  74. PRESUBMIT.py
  75. PRESUBMIT_test.py
  76. PRESUBMIT_test_mocks.py
  77. README.md
  78. WATCHLISTS
README.md

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