Put stricter flag checks

Also removed a log which gives away flag.

Bug: 312976400
Test: manual
Change-Id: I4a989de8b6b920666aabf0cc9311e28becc4d862

src/com/android/settings/privatespace/onelock/FaceFingerprintUnlockController.java

@@ -35,7 +35,7 @@ public class FaceFingerprintUnlockController extends AbstractPreferenceControlle
 
     @Override
     public boolean isAvailable() {
-        return false;
+        return android.os.Flags.allowPrivateProfile();
     }
 
     @Override