[AWARE] Move manager tests from service to manager directory

Move operation - no functional tests. Only editorial changes:
- Remove (no longer) necessary import statements
- Removed reference to a constant sitting on the service side.
  Replaced with locally defined constant.

(cherry pick of commit 7ba5ad3c53dac62e56cd12dbe2054ce8374b6b92)

Bug: 32954930
Test: unit-tests pass
Change-Id: Ibe463fa73c27fc67996460eb91ea0222437927a6