PowerManagerServiceTest: Set dreams as supported & enabled by default

Some tests depend on dreams being supported & enabled.
This change sets the corresponding config values in the test setup.

Bug: 293660604
Test: atest PowerManagerServiceTest
Change-Id: I022f69f49ef0a7380a7d772b43db4ed7e3fb28b9
(cherry picked from commit 1441ebb13f61da8d668c7bb8e44ecf99f2159999)
1 file changed