Fix crash on devices without fingerprint feature.

Fixes bug 26877020

Change-Id: Ibee4d956beb0ce9af35f01857370c1378ef5594a

src/com/android/settings/SecuritySettings.java

@@ -691,7 +691,7 @@ public class SecuritySettings extends SettingsPreferenceFragment
             // Fingerprint
             FingerprintManager fpm =
                     (FingerprintManager) context.getSystemService(Context.FINGERPRINT_SERVICE);
-            if (fpm.isHardwareDetected()) {
+            if (fpm != null && fpm.isHardwareDetected()) {
                 // This catches the title which can be overloaded in an overlay
                 data = new SearchIndexableRaw(context);
                 data.title = res.getString(R.string.security_settings_fingerprint_preference_title);