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: I73d39d765dba0c1a75111c37b29ccf1c85d2cdd8