Reland "Add and implement mojo interfaces for EcheApp"

This is a reland of 01ed1abe15c52a837d0ad0ad348a97b415b84b0f

Initialized current_phone_hub_feature_status_ in
eche_feature_status_provider.cc. This was an MSan error.

Original change's description:
> Add and implement mojo interfaces for EcheApp
>
> crbug/1182418
>
> Bug: b/176936453
> Bug: t status
> Test: chromeos_components_unittests
> Change-Id: I65fae9f624c985e722b5af94e48c5918893ac0fb
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2698709
> Reviewed-by: Scott Violet <sky@chromium.org>
> Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
> Reviewed-by: Daniel Cheng <dcheng@chromium.org>
> Reviewed-by: Daniel Nishi <dhnishi@chromium.org>
> Commit-Queue: Christine Franks <christyfranks@google.com>
> Cr-Commit-Position: refs/heads/master@{#859612}

Bug: b/176936453
Bug: t status
Change-Id: I173e98b3d758484dcdd27e5a8d0880c8ab672625
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2733993
Reviewed-by: Daniel Cheng <dcheng@chromium.org>
Reviewed-by: Daniel Nishi <dhnishi@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Commit-Queue: Christine Franks <christyfranks@google.com>
Cr-Commit-Position: refs/heads/master@{#860136}
18 files changed
tree: 73184e72f89722420a0cf1f65e8d630c1d3ec54b
  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. jingle/
  32. media/
  33. mojo/
  34. native_client_sdk/
  35. net/
  36. pdf/
  37. ppapi/
  38. printing/
  39. remoting/
  40. rlz/
  41. sandbox/
  42. services/
  43. skia/
  44. sql/
  45. storage/
  46. styleguide/
  47. testing/
  48. third_party/
  49. tools/
  50. ui/
  51. url/
  52. weblayer/
  53. .clang-format
  54. .clang-tidy
  55. .eslintrc.js
  56. .git-blame-ignore-revs
  57. .gitattributes
  58. .gitignore
  59. .gn
  60. .vpython
  61. .vpython3
  62. .yapfignore
  63. AUTHORS
  64. BUILD.gn
  65. CODE_OF_CONDUCT.md
  66. codereview.settings
  67. DEPS
  68. DIR_METADATA
  69. ENG_REVIEW_OWNERS
  70. LICENSE
  71. LICENSE.chromium_os
  72. OWNERS
  73. PRESUBMIT.py
  74. PRESUBMIT_test.py
  75. PRESUBMIT_test_mocks.py
  76. README.md
  77. WATCHLISTS
README.md

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