Log start of sign in flow

Test: statsd_testdrive
https://paste.googleplex.com/4692799132270592
Bug: 315947418
Change-Id: I94a1a44596206c15a5497fd8aec1d8a2628f03e3

src/com/android/settings/privatespace/PrivateSpaceSetLockFragment.java

@@ -97,6 +97,8 @@ public class PrivateSpaceSetLockFragment extends InstrumentedFragment {
             mMetricsFeatureProvider.action(
                     getContext(), SettingsEnums.ACTION_PRIVATE_SPACE_SETUP_USE_SCREEN_LOCK);
             // Simply Use default screen lock. No need to handle
+            mMetricsFeatureProvider.action(
+                    getContext(), SettingsEnums.ACTION_PRIVATE_SPACE_SETUP_ACCOUNT_LOGIN_START);
             launchActivityForAction(ACCOUNT_LOGIN_ACTION);
         };
     }