Offer a null FignerprintManager.

Settings likes null.

Test: builds
Bug: 32060380
Change-Id: I5ba19bccfd48916d4e581518928a6aee19e84a77

src/com/android/settings/Utils.java

@@ -44,6 +44,7 @@ import android.content.res.TypedArray;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.hardware.fingerprint.FingerprintManager;
 import android.net.ConnectivityManager;
 import android.net.LinkProperties;
 import android.net.Uri;
@@ -1175,4 +1176,12 @@ public final class Utils extends com.android.settingslib.Utils {
         }
         return null;
     }
+
+    public static FingerprintManager getFingerprintManagerOrNull(Context context) {
+        if (context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_FINGERPRINT)) {
+            return context.getSystemService(FingerprintManager.class);
+        } else {
+            return null;
+        }
+    }
 }