Fix failing enterprise disclosure test

Device admin is only detected during initialization, so I moved the
preference controller creation after mocking the fields.

Bug: 206969078
Bug: 207175350
Test: atest CarSettingsUnitTests:com.android.car.settings.enterprise.EnterpriseDisclosurePreferenceControllerTest
Change-Id: I1bd968006886bdef25389aa808d8a1818b70971e
Merged-In: I1bd968006886bdef25389aa808d8a1818b70971e
(cherry picked from commit ac4af46329c84e73c80dba3faa226ceed21a1d7a)
1 file changed