Floss: Implement no-op Suspend/Resume API

To prepare for powerd integration:
* Enable object manager for adapter objects so that btmanagerd can
  properly detect adapter readiness of Suspend API
* Implement no-op Suspend/Resume so that powerd integration will not
  crash.

Bug: 224606285
Tag: #floss
Test: Manual - build.py

Change-Id: If99a05bdc9e9fa1733033ccc4f0849297d1c7b1f