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)

tests/app/src/com/android/settings/password/SetupChooseLockPasswordAppTest.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2017 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 static android.support.test.espresso.Espresso.onView;
+import static android.support.test.espresso.action.ViewActions.click;
+import static android.support.test.espresso.assertion.ViewAssertions.matches;
+import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static android.support.test.espresso.matcher.ViewMatchers.withId;
+import static android.support.test.espresso.matcher.ViewMatchers.withText;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import android.support.test.filters.MediumTest;
+import android.support.test.rule.ActivityTestRule;
+import android.support.test.runner.AndroidJUnit4;
+
+import com.android.settings.R;
+
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(AndroidJUnit4.class)
+@MediumTest
+public class SetupChooseLockPasswordAppTest {
+
+    @Rule
+    public ActivityTestRule<SetupChooseLockPassword> mActivityTestRule =
+            new ActivityTestRule<>(
+                    SetupChooseLockPassword.class,
+                    true /* enable touch at launch */,
+                    false /* don't launch at every test */);
+
+    @Test
+    public void testSkipDialogIsShown() throws Throwable {
+        SetupChooseLockPassword activity = mActivityTestRule.launchActivity(null);
+
+        onView(withId(R.id.cancel_button))
+                .check(matches(withText(R.string.skip_label)))
+                .check(matches(isDisplayed()))
+                .perform(click());
+        onView(withId(android.R.id.button1)).check(matches(isDisplayed())).perform(click());
+
+        assertThat(activity.isFinishing()).named("Is finishing").isTrue();
+    }
+}