Convert some security setting logic to PreferenceController

- Manage trust agent
- Show password
- Sim lock
- Screen pinning

Bug: 32953042
Test: robotests
Change-Id: I0c781a505238cae7a6643b701b750ca63a87a8a5

src/com/android/settings/security/ShowPasswordPreferenceController.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2018 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.security;
+
+import android.content.Context;
+import android.os.UserHandle;
+import android.provider.Settings;
+
+import com.android.internal.widget.LockPatternUtils;
+import com.android.settings.core.TogglePreferenceController;
+import com.android.settings.overlay.FeatureFactory;
+
+public class ShowPasswordPreferenceController extends TogglePreferenceController {
+
+    private static final String KEY_SHOW_PASSWORD = "show_password";
+    private static final int MY_USER_ID = UserHandle.myUserId();
+    private final LockPatternUtils mLockPatternUtils;
+
+    public ShowPasswordPreferenceController(Context context) {
+        super(context, KEY_SHOW_PASSWORD);
+        mLockPatternUtils = FeatureFactory.getFactory(context)
+                .getSecurityFeatureProvider()
+                .getLockPatternUtils(context);
+    }
+
+    @Override
+    public boolean isChecked() {
+        return Settings.System.getInt(mContext.getContentResolver(),
+                Settings.System.TEXT_SHOW_PASSWORD, 1) != 0;
+    }
+
+    @Override
+    public void setChecked(boolean isChecked) {
+        Settings.System.putInt(mContext.getContentResolver(), Settings.System.TEXT_SHOW_PASSWORD,
+                isChecked ? 1 : 0);
+        mLockPatternUtils.setVisiblePasswordEnabled(isChecked, MY_USER_ID);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return AVAILABLE;
+    }
+}
+