Fix NPE in DeviceInfoSettings

Bug 7192187

Change-Id: I6d404e5228c7f66e37137a27ebd555a88dda2f74
diff --git a/src/com/android/settings/DeviceInfoSettings.java b/src/com/android/settings/DeviceInfoSettings.java
index 258ea64..eb9e918 100644
--- a/src/com/android/settings/DeviceInfoSettings.java
+++ b/src/com/android/settings/DeviceInfoSettings.java
@@ -175,7 +175,10 @@
 
     private void removePreferenceIfBoolFalse(String preference, int resId) {
         if (!getResources().getBoolean(resId)) {
-            getPreferenceScreen().removePreference(findPreference(preference));
+            Preference pref = findPreference(preference);
+            if (pref != null) {
+                getPreferenceScreen().removePreference(pref);
+            }
         }
     }