Address failing tests for CtsMultiUserHostTest.

isDefaultServiceEnabled requires a permission check which looks like CTS
tests do not have. Instead, manually check if the services passed in are
default services, if not then use the ones provided for testing.

Bug: 263418986
Test: atest CtsMultiUserHostTestCases:android.host.multiuser.EphemeralTest#testSwitchAndRemoveEphemeralUser
atest CtsAmbientContextServiceTestCases atest
CtsWearableSensingServiceTestCases.
Ignore-AOSP-First: to prevent new feature leak.

Change-Id: I2b2871d70d45401fe789c6abf948c42e2e12c871