Fix build - add missing import

Change-Id: I31c5db903532c68b42760f29b3fbb46c7c7854f8
diff --git a/src/com/android/settings/SecuritySettings.java b/src/com/android/settings/SecuritySettings.java
index 5ebc1f1..454ea60 100644
--- a/src/com/android/settings/SecuritySettings.java
+++ b/src/com/android/settings/SecuritySettings.java
@@ -31,6 +31,7 @@
 import android.database.Cursor;
 import android.location.LocationManager;
 import android.os.Bundle;
+import android.os.SystemProperties;
 import android.preference.CheckBoxPreference;
 import android.preference.Preference;
 import android.preference.PreferenceActivity;