bluetooth: Introduce scan windows to BLE scan

Also move BLE scan logic to a different class.

This is a preparation refactor needed to add Bluetooth Classic scan to
Android, because Android provides two very different set of APIs for BT
Classic and BLE scan and don't allow those two scans at the same time.
For ChromeBluetoothAdapter to work with a relatively unified interface
for both types of scans, this CL encapsulates the BLE scan logic to a
separate class and introduced scan windows to it.

For the time being no code in production uses scan windows, so this CL
introduces unit tests to test scan windows. It will only be used in
production after BT Classic scan is added behind a feature flag.

Also changed BluetoothTestBase so that tests can use fake time source.

BUG=375245353
TEST=device_unittests
TEST=BLE scan on an Android tablet

Change-Id: Ied031c708a398cea6fd56cfa55ab86a3e615bd96
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5990236
Reviewed-by: Jack Hsieh <chengweih@chromium.org>
Commit-Queue: Garfield Tan <xutan@chromium.org>
Reviewed-by: Matt Reynolds <mattreynolds@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1384462}
15 files changed
tree: 69678a30f5d49e48bc121452ce038d8907aa0264
  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. gpu/
  24. headless/
  25. infra/
  26. ios/
  27. ipc/
  28. media/
  29. mojo/
  30. native_client_sdk/
  31. net/
  32. pdf/
  33. ppapi/
  34. printing/
  35. remoting/
  36. rlz/
  37. sandbox/
  38. services/
  39. skia/
  40. sql/
  41. storage/
  42. styleguide/
  43. testing/
  44. third_party/
  45. tools/
  46. ui/
  47. url/
  48. webkit/
  49. .clang-format
  50. .clang-tidy
  51. .clangd
  52. .git-blame-ignore-revs
  53. .gitallowed
  54. .gitattributes
  55. .gitignore
  56. .gitmodules
  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. CPPLINT.cfg
  68. CRYPTO_OWNERS
  69. DEPS
  70. DIR_METADATA
  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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