Give CompanionDeviceServiceConnector its own worker thread

Allocate a dedicated ServiceThread to be used by CDM's
CompanionDeviceServiceConnector's.

Bug: 211398735
Test: atest --iterations 10 CtsCompanionDeviceManagerCoreTestCases
Change-Id: I9405ec59bfd122b5a651f763fceade51a05b4296
1 file changed