Clean up choose lock intent creation

Consolidated the many variants of ChooseLock*.createIntent, so that
it will take the same set of arguments.

Also modified SetupChooseLock*.createIntent to modifyIntentForSetup,
which will take the intent created by ChooseLock* and modify it for
use with setup.

Test: cd tests/robotests && mma
Change-Id: I5ff033f459c33ec9980872a536b3996d89f2bbbb

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

@@ -0,0 +1,87 @@
+/*
+ * 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.content.Context;
+import android.content.Intent;
+
+import com.android.settings.R;
+
+/**
+ * Helper for handling managed passwords in security settings UI.
+ * It provides resources that should be shown in settings UI when lock password quality is set to
+ * {@link android.app.admin.DevicePolicyManager#PASSWORD_QUALITY_MANAGED} and hooks for implementing
+ * an option for setting the password quality to
+ * {@link android.app.admin.DevicePolicyManager#PASSWORD_QUALITY_MANAGED}.
+ */
+public class ManagedLockPasswordProvider {
+    /** Factory method to make it easier to inject extended ManagedLockPasswordProviders. */
+    public static ManagedLockPasswordProvider get(Context context, int userId) {
+        return new ManagedLockPasswordProvider();
+    }
+
+    protected ManagedLockPasswordProvider() {}
+
+    /**
+     * Whether choosing/setting a managed lock password is supported for the user.
+     * Please update {@link #getPickerOptionTitle(boolean)} if overridden to return true.
+     */
+    boolean isSettingManagedPasswordSupported() { return false; }
+
+    /**
+     * Whether the user should be able to choose managed lock password.
+     */
+    boolean isManagedPasswordChoosable() { return false; }
+
+    /**
+     * Returns title for managed password preference in security (lock) setting picker.
+     * Should be overridden if {@link #isManagedPasswordSupported()} returns true.
+     * @param forFingerprint Whether fingerprint unlock is enabled.
+     */
+    String getPickerOptionTitle(boolean forFingerprint) { return ""; }
+
+    /**
+     * Gets resource id of the lock screen preference that should be displayed in security settings
+     * if the current password quality is set to
+     * {@link android.app.admin.DevicePolicyManager#PASSWORD_QUALITY_MANAGED}.
+     * @param forProfile Whether the settings are shown for a user profile rather than a user.
+     */
+    public int getResIdForLockUnlockScreen(boolean forProfile) {
+        return forProfile ? R.xml.security_settings_password_profile
+                : R.xml.security_settings_password;
+    }
+
+    /**
+     * Gets resource id of the subscreen that should be shown after clicking gear icon for lock
+     * screen preference in security settings if the current password quality is set to
+     * {@link android.app.admin.DevicePolicyManager#PASSWORD_QUALITY_MANAGED}.
+     */
+    public int getResIdForLockUnlockSubScreen() {
+        return R.xml.security_settings_password_sub;
+    }
+
+    /**
+     * Creates intent that should be launched when user chooses managed password in the lock
+     * settings picker.
+     * @param requirePasswordToDecrypt Whether a password is needed to decrypt the user.
+     * @param password Current lock password.
+     * @return Intent that should update lock password to a managed password.
+     */
+    Intent createIntent(boolean requirePasswordToDecrypt, String password) {
+        return null;
+    }
+}