Fix home settings landing page

Bug: 188565060
Test: local
Change-Id: I2100d6a6e33381ea3da761f85797fed940e5a284
diff --git a/src/com/android/launcher3/settings/SettingsActivity.java b/src/com/android/launcher3/settings/SettingsActivity.java
index 915e140..dbd9c28 100644
--- a/src/com/android/launcher3/settings/SettingsActivity.java
+++ b/src/com/android/launcher3/settings/SettingsActivity.java
@@ -113,6 +113,12 @@
         Utilities.getPrefs(getApplicationContext()).registerOnSharedPreferenceChangeListener(this);
     }
 
+    @Override
+    protected void onStop() {
+        super.onStop();
+        finish();
+    }
+
     /**
      * Obtains the preference fragment to instantiate in this activity.
      *