Adding alarms and reminders activity

Adding a settings screen to control the permission SCHEDULE_EXACT_ALARM.
Apps can start this by starting a newly introduced API intent
REQUEST_SCHEDULE_EXACT_ALARM.

Test: make -j RunSettingsRoboTests
Manually by UI inspection:
Settings -> Apps -> Special App access -> Alarms and Reminders
or by running:
adb shell am start -a android.settings.REQUEST_SCHEDULE_EXACT_ALARM

Bug: 171306433
Bug: 171305516
Change-Id: I1293d38fc50a22b2af46f80ab24f676ed632f964

src/com/android/settings/applications/AppStateAlarmsAndRemindersBridge.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (C) 2021 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.applications;
+
+import android.Manifest;
+import android.app.AppOpsManager;
+import android.content.Context;
+
+import com.android.settingslib.applications.ApplicationsState;
+import com.android.settingslib.applications.ApplicationsState.AppEntry;
+import com.android.settingslib.applications.ApplicationsState.AppFilter;
+
+import java.util.List;
+
+/**
+ * Connects app op info to the ApplicationsState. Extends {@link AppStateAppOpsBridge} to tailor
+ * to the semantics of {@link Manifest.permission#SCHEDULE_EXACT_ALARM}.
+ * Also provides app filters that can use the info.
+ */
+public class AppStateAlarmsAndRemindersBridge extends AppStateAppOpsBridge {
+
+    private AppOpsManager mAppOpsManager;
+
+    public AppStateAlarmsAndRemindersBridge(Context context, ApplicationsState appState,
+            Callback callback) {
+        super(context, appState, callback,
+                AppOpsManager.strOpToOp(AppOpsManager.OPSTR_SCHEDULE_EXACT_ALARM),
+                new String[]{Manifest.permission.SCHEDULE_EXACT_ALARM});
+
+        mAppOpsManager = context.getSystemService(AppOpsManager.class);
+    }
+
+    /**
+     * Returns information regarding {@link Manifest.permission#SCHEDULE_EXACT_ALARM} for the given
+     * package and uid.
+     */
+    public PermissionState createPermissionState(String packageName, int uid) {
+        final PermissionState permState = getPermissionInfo(packageName, uid);
+        permState.appOpMode = mAppOpsManager.unsafeCheckOpRawNoThrow(
+                AppOpsManager.OPSTR_SCHEDULE_EXACT_ALARM, uid, packageName);
+        return permState;
+    }
+
+    @Override
+    protected void updateExtraInfo(AppEntry app, String pkg, int uid) {
+        app.extraInfo = createPermissionState(pkg, uid);
+    }
+
+    @Override
+    protected void loadAllExtraInfo() {
+        final List<AppEntry> allApps = mAppSession.getAllApps();
+        for (int i = 0; i < allApps.size(); i++) {
+            final AppEntry currentEntry = allApps.get(i);
+            updateExtraInfo(currentEntry, currentEntry.info.packageName, currentEntry.info.uid);
+        }
+    }
+
+    public static final AppFilter FILTER_CLOCK_APPS = new AppFilter() {
+
+        @Override
+        public void init() {
+        }
+
+        @Override
+        public boolean filterApp(AppEntry info) {
+            if (info.extraInfo instanceof PermissionState) {
+                final PermissionState permissionState = (PermissionState) info.extraInfo;
+                return permissionState.permissionDeclared;
+            }
+            return false;
+        }
+    };
+
+}