Fix FrameworksServicesTests:StorageManagerServiceTest

Use androidx.test not android.support.test.
And remove android.support.test from build by removing unnecessary
frameworks-base-testutils > android.support.test dependency

Bug: 117990406
Test: m checkbuild; atest FrameworksServicesTests:StorageManagerServiceTest
Change-Id: Ia825e0926b46855f9056739441cb21a065692076
6 files changed