Allow skipping PIN setup screen

So that setup wizard can show PIN option by default.

Test: Added Robolectric and instrumentation tests
Bug: 38509560
Change-Id: Id72744dd444b9b026ca5f28f230bae3bec254b2f
(cherry picked from commit 0f897d79f6)

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

@@ -201,7 +201,7 @@ public class ChooseLockPassword extends SettingsActivity {
         private String mFirstPin;
         private RecyclerView mPasswordRestrictionView;
         protected boolean mIsAlphaMode;
-        private Button mCancelButton;
+        protected Button mCancelButton;
         private Button mNextButton;
 
         private TextChangedHandler mTextChangedHandler;

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

@@ -35,7 +35,6 @@ import com.android.settings.R;
 import com.android.settings.SetupEncryptionInterstitial;
 import com.android.settings.SetupWizardUtils;
 import com.android.settings.fingerprint.SetupFingerprintEnrollFindSensor;
-import com.android.settings.fingerprint.SetupSkipDialog;
 import com.android.settings.utils.SettingsDividerItemDecoration;
 import com.android.setupwizardlib.GlifPreferenceLayout;
 

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

@@ -84,6 +84,9 @@ public class SetupChooseLockPassword extends ChooseLockPassword {
         @Override
         public void onViewCreated(View view, Bundle savedInstanceState) {
             super.onViewCreated(view, savedInstanceState);
+
+            mCancelButton.setText(R.string.skip_label);
+
             boolean showOptionsButton = getActivity().getIntent().getBooleanExtra(
                     ChooseLockGenericFragment.EXTRA_SHOW_OPTIONS_BUTTON, false);
             if (showOptionsButton) {
@@ -99,6 +102,12 @@ public class SetupChooseLockPassword extends ChooseLockPassword {
                 case R.id.screen_lock_options:
                     launchChooseLockGeneric();
                     break;
+                case R.id.cancel_button:
+                    SetupSkipDialog dialog = SetupSkipDialog.newInstance(
+                            getActivity().getIntent()
+                                    .getBooleanExtra(SetupSkipDialog.EXTRA_FRP_SUPPORTED, false));
+                    dialog.show(getFragmentManager());
+                    break;
                 default:
                     super.onClick(v);
             }

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

@@ -0,0 +1,83 @@
+/*
+ * 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.app.Activity;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.app.FragmentManager;
+import android.content.DialogInterface;
+import android.os.Bundle;
+import android.support.annotation.NonNull;
+
+import com.android.internal.logging.nano.MetricsProto;
+import com.android.settings.R;
+import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
+
+public class SetupSkipDialog extends InstrumentedDialogFragment
+        implements DialogInterface.OnClickListener {
+
+    public static final String EXTRA_FRP_SUPPORTED = ":settings:frp_supported";
+
+    private static final String ARG_FRP_SUPPORTED = "frp_supported";
+    private static final String TAG_SKIP_DIALOG = "skip_dialog";
+    public static final int RESULT_SKIP = Activity.RESULT_FIRST_USER + 10;
+
+    public static SetupSkipDialog newInstance(boolean isFrpSupported) {
+        SetupSkipDialog dialog = new SetupSkipDialog();
+        Bundle args = new Bundle();
+        args.putBoolean(ARG_FRP_SUPPORTED, isFrpSupported);
+        dialog.setArguments(args);
+        return dialog;
+    }
+
+    @Override
+    public int getMetricsCategory() {
+        return MetricsProto.MetricsEvent.DIALOG_FINGERPRINT_SKIP_SETUP;
+    }
+
+    @Override
+    public Dialog onCreateDialog(Bundle savedInstanceState) {
+        return onCreateDialogBuilder().create();
+    }
+
+    @NonNull
+    public AlertDialog.Builder onCreateDialogBuilder() {
+        Bundle args = getArguments();
+        return new AlertDialog.Builder(getContext())
+                .setPositiveButton(R.string.skip_anyway_button_label, this)
+                .setNegativeButton(R.string.go_back_button_label, this)
+                .setMessage(args.getBoolean(ARG_FRP_SUPPORTED) ?
+                        R.string.lock_screen_intro_skip_dialog_text_frp :
+                        R.string.lock_screen_intro_skip_dialog_text);
+    }
+
+    @Override
+    public void onClick(DialogInterface dialog, int button) {
+        switch (button) {
+            case DialogInterface.BUTTON_POSITIVE:
+                Activity activity = getActivity();
+                activity.setResult(RESULT_SKIP);
+                activity.finish();
+                break;
+        }
+    }
+
+    public void show(FragmentManager manager) {
+        show(manager, TAG_SKIP_DIALOG);
+    }
+}