instrument fingerprint settings

instrument visibility on all fingerprint views
  rename and delete action
  add fingerprint action is implicit in flow

Bug: 22951001
Change-Id: I53f048f479e24754972b801598d5da393ba9d716

src/com/android/settings/fingerprint/FingerprintEnrollFinish.java

@@ -25,6 +25,7 @@ import android.preference.Preference;
 import android.view.View;
 import android.widget.Button;
 
+import com.android.internal.logging.MetricsLogger;
 import com.android.settings.R;
 import com.android.settings.fingerprint.FingerprintSettings.FingerprintPreference;
 
@@ -70,4 +71,9 @@ public class FingerprintEnrollFinish extends FingerprintEnrollBase {
         }
         super.onClick(v);
     }
+
+    @Override
+    protected int getMetricsCategory() {
+        return MetricsLogger.FINGERPRINT_ENROLL_FINISH;
+    }
 }