Wired remaining SpecialAppAccess for ECM.

This change enables the remaining settings for ECM, and adds tests for
both this and previous ECM changes.

Bug: 297372999
Test: Tested on device
Test: atest SpaPrivilegedLibTests
Test: atest com.android.settings.applications.specialaccess.notificationaccess
Test: atest com.android.settings.datausage
Test: atest PremiumSmsAccessTest
Test: atest RestrictedPreferenceHelperTest
Change-Id: Id9500c82a100b939d965aa7932ccb968e85f690a