Reduce the number of UpdateCurrentNetworkState calls during startup

UpdateCurrentNetworkState is called 3 times during the initialization
phase of Cronet, those are redundant calls as we don't expect the state
of the network to change during startup within ~10ms and if it did
change then there would be callbacks that should notify us to update
our network state.

Reducing initialization time should allow us to process the first
request at an earlier time which allows the app to load content in a
timely fashion.

Removed base::featureFlag StoreConnectionSubtype as it has been enabled
for more than half a year (more than a single major version)

Tested: Enabled the flag and launched Cronet sample app, the perfetto
trace showed a single instance of UpdateCurrentNetworkState

Bug: 376646498
Change-Id: Ibeac34b83636ab6573e3c82bafa7d79286697961
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6111162
Reviewed-by: Stefano Duo <stefanoduo@google.com>
Auto-Submit: Mohannad Farrag <aymanm@google.com>
Commit-Queue: Mohannad Farrag <aymanm@google.com>
Cr-Commit-Position: refs/heads/main@{#1404239}
10 files changed
tree: 0dfbb7dcc96eb1cfef8c5f40f817e6b8d4819dd2
  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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