Migrate mocking power tests

- Combine pms test with pms mocking test
  Since both classes mock anyway, it is simpler to combine them
- Remove line from owners for un-migrated tests
- Add necessary libraries to build.

Bug: 290764236
Test: atest PowerServiceTests
Change-Id: Iccc3e3910a1b0453e60703dd2db7f61d01588315