Avoid NPE when logging the entry point to Settings

The populator class that serializes the proto uses a switch
and throws an NPE.

Bug:19911288
Change-Id: Id0fa371b3c64e706e14a13bb6e643406f94be035
diff --git a/java/src/com/android/inputmethod/latin/settings/SettingsActivity.java b/java/src/com/android/inputmethod/latin/settings/SettingsActivity.java
index dee4811..9975277 100644
--- a/java/src/com/android/inputmethod/latin/settings/SettingsActivity.java
+++ b/java/src/com/android/inputmethod/latin/settings/SettingsActivity.java
@@ -50,7 +50,7 @@
         }
         StatsUtils.onSettingsActivity(
                 intent.hasExtra(EXTRA_ENTRY_KEY) ? intent.getStringExtra(EXTRA_ENTRY_KEY)
-                        : intent.getStringExtra(EXTRA_ENTRY_VALUE_SYSTEM_SETTINGS));
+                        : EXTRA_ENTRY_VALUE_SYSTEM_SETTINGS);
     }
 
     @Override