DO NOT MERGE: Fix DPM.ACTION_SET_NEW_PASSWORD

This is a cherry-pick of ag/1640561.

1. Context.getActivityToken is not available in n mr2, passed the token
   from the activity to the controller instead.

2. Haven't pick the tests from master to mr2 branch because robotest
   is not set up in mr2 branch.

Fix: 32959373

Change-Id: I2f73d01ab11e91b337beb90c05bbcb857dfd40dc

src/com/android/settings/password/FingerprintManagerWrapper.java

@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.password;
+
+import android.annotation.NonNull;
+import android.hardware.fingerprint.FingerprintManager;
+
+import com.android.internal.util.Preconditions;
+
+/**
+ * Wrapper of {@link FingerprintManager}. Workaround for roboelectic testing. See
+ * {@link IFingerprintManager} for details.
+ */
+public class FingerprintManagerWrapper implements IFingerprintManager {
+    private @NonNull FingerprintManager mFingerprintManager;
+
+    public FingerprintManagerWrapper(@NonNull FingerprintManager fingerprintManager) {
+        Preconditions.checkNotNull(fingerprintManager);
+        mFingerprintManager = fingerprintManager;
+    }
+
+    public boolean isHardwareDetected() {
+        return mFingerprintManager.isHardwareDetected();
+    }
+
+    public boolean hasEnrolledFingerprints(int userId) {
+        return mFingerprintManager.hasEnrolledFingerprints(userId);
+    }
+
+    public long preEnroll() {
+        return mFingerprintManager.preEnroll();
+    }
+}