Fix broken tests in RedactionInterstitialTest

correctly set the user as managed profile after the
implementation for ShadowUserManager#isManagedProfile changed.

Fixes: 154567856
Test: make RunSettingsRoboTests ROBOTEST_FILTER=com.android.settings.notification.RedactionInterstitialTest
Change-Id: I14472913391c3986c5f27391023e396b7b64aad3
1 file changed