init: add an initializer for keychord_id_

Add unit test to ensure all POD types of Service are initialized.

Bug: 37855222
Test: Ensure bugreport is triggered via keychord properly.
Test: New unit tests
Merged-In: If2cfea15a74ab417a7b909a60c264cb8eb990de7
Change-Id: If2cfea15a74ab417a7b909a60c264cb8eb990de7
(cherry picked from commit 7da548578c25683fe0082283303e16961df312da)
4 files changed