Add a Repeat annotation for CDM tests

This CL introduces an easy way to repeat the execution of tests whose
outcome might be non-deterministic.

Additionally, this CL makes use of the new annotation for the
cdm test checking callback order.

Test: atest CtsCompanionDeviceManagerCoreTestCases
Change-Id: Ie4fe73268fe4f11c374a9555794737f78ecb7e83
2 files changed