Mojo: Invitation API [reland]

Reland fixes a simple merge conflict which caused a non-existent
header to be included. Original CL is
https://chromium-review.googlesource.com/c/chromium/src/+/1066807

This is a public C API replacement for the EDK invitation API, i.e.
Incoming/OutgoingBrokerClientInvitation et al. Here the new C calls
are introduced and covered by unit tests.

See the associated bug and the bugs it's blocking for more context
and follow-up work.

TBR=jcivelli@chromium.org

Bug: 844231
Change-Id: If23b70ea381031a4caaed0ba5e6cf45c6b218971
Reviewed-on: https://chromium-review.googlesource.com/1067087
Reviewed-by: Ken Rockot <rockot@chromium.org>
Commit-Queue: Ken Rockot <rockot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#560185}

CrOS-Libchrome-Original-Commit: f86cdb8bcfcdeec95ec57789dd3ae7d43d812862
17 files changed
tree: 76f4645623904a42c5b02d7f186790a2b0cb5305
  1. base/
  2. build/
  3. components/
  4. dbus/
  5. device/
  6. ipc/
  7. mojo/
  8. testing/
  9. third_party/
  10. ui/