Logs accessibility service user trigger status.

* Uses the atom AccessibilityServiceReported in westworld.

Bug: 151285965
Test: make statsd_testdrive && ./out/host/linux-x86/bin/statsd_testdrive 267
Change-Id: Id6a109e4e90c09f2310d92533cd4632875712f81

src/com/android/settings/accessibility/AccessibilityStatsLogUtils.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2020 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.accessibility;
+
+import android.content.ComponentName;
+
+import com.android.settings.core.instrumentation.SettingsStatsLog;
+
+/** Methods for logging accessibility states. */
+public final class AccessibilityStatsLogUtils {
+
+    private AccessibilityStatsLogUtils() {}
+
+    /**
+     * Logs accessibility service name and its enabled status. Calls this when the user trigger
+     * the accessibility service to be enabled/disabled.
+     *
+     * @param packageName the package name of the service. Need to be the flattened {@link
+     *                    ComponentName}
+     * @param enabled     {@code true} if the service is enabled
+     */
+    static void logServiceStatus(String packageName, boolean enabled) {
+        SettingsStatsLog.write(SettingsStatsLog.ACCESSIBILITY_SERVICE_REPORTED, packageName,
+                convertToLoggingServiceStatus(enabled));
+    }
+
+    private static int convertToLoggingServiceStatus(boolean enabled) {
+        return enabled ? SettingsStatsLog.ACCESSIBILITY_SERVICE_REPORTED__SERVICE_STATUS__ENABLED
+                : SettingsStatsLog.ACCESSIBILITY_SERVICE_REPORTED__SERVICE_STATUS__DISABLED;
+    }
+}