Revert "[bt] bt-emulator library abstraction (Part 1)"

This reverts commit 1d31a25a31fe34b241a6e436edd0ed4b7eb01cc8.

Reason for revert: timing out in CQ

Original change's description:
> [bt] bt-emulator library abstraction (Part 1)
> 
> - The FakeHciDevice type from the fuchsia-bluetooth crate now connects
>   to a bt-emulator device and provides a proxy to its HciEmulator FIDL
>   implementation.
> - The bt-fake-hci driver binding and test device management logic has
>   been moved to fake_hci.rs. Old copies in hci.rs will be removed once
>   all users go through FakeHciDevice.
> - Added a unit test for device creation.
> - Fixed a number of bugs in the bt-host driver's shut-down logic that
>   were surfaced by the new unit test:
>   * Fixed deadlocks triggered by DDK "unbind" received while a
>     gap::Adapter is initializing.
>   * Fixed use-after-free when the clean up functions are called multiple
>     times.
>    * Added a unit test for calling gap::Adapter::ShutDown() before
>      gap::Adapter::Initialize() has returned, to enforce the latter's
>      "abort" contract.
> 
> Bug: BT-229
> Test: 1. bt-host-unittests --gtest_filter=GAP_AdapterTest.*
>       2. bt-integration-tests
>       3. bluetooth-crate-unittests
> Change-Id: I9d58e2542792151897ae76b720df1119ed3dc6b3

TBR=tkilbourn@google.com,armansito@google.com,nickpollard@google.com

Change-Id: If15e5178ddfa39d1511d4bed8ca2e588ea6d1ecc
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: BT-229
15 files changed
tree: 0ca8c633b64fe6cc0323a2dccd20d25b0702738b
  1. boards/
  2. build/
  3. buildtools/
  4. bundles/
  5. docs/
  6. examples/
  7. garnet/
  8. infra/
  9. peridot/
  10. products/
  11. scripts/
  12. sdk/
  13. src/
  14. third_party/
  15. tools/
  16. zircon/
  17. .clang-format
  18. .clang-tidy
  19. .dir-locals.el
  20. .gitattributes
  21. .gitignore
  22. .gn
  23. AUTHORS
  24. BUILD.gn
  25. CODE_OF_CONDUCT.md
  26. CONTRIBUTING.md
  27. LICENSE
  28. OWNERS
  29. PATENTS
  30. README.md
  31. rustfmt.toml
README.md

Fuchsia

Pink + Purple == Fuchsia (a new operating system)

What is Fuchsia?

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Fuchsia is an open source project with a code of conduct that we expect everyone who interacts with the project to respect.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

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