Log FOLD_STATE_DURATION_REPORTED atom

Logs fold state changes provided by FoldStateLoggingProvider to FrameworkStatsLog.

Metric Design doc: eldar/31274625

Bug: 198305865
Test: m statsd_testdrive && ./out/host/linux-x86/bin/statsd_testdrive 414
Change-Id: Id841b43d7e02f513594e69594381f562d4c9e616

packages/SystemUI/src/com/android/systemui/dagger/SysUIComponent.java

@@ -28,6 +28,8 @@ import com.android.systemui.media.taptotransfer.receiver.MediaTttChipControllerR
 import com.android.systemui.media.taptotransfer.sender.MediaTttChipControllerSender;
 import com.android.systemui.people.PeopleProvider;
 import com.android.systemui.statusbar.policy.ConfigurationController;
+import com.android.systemui.unfold.FoldStateLogger;
+import com.android.systemui.unfold.FoldStateLoggingProvider;
 import com.android.systemui.unfold.SysUIUnfoldComponent;
 import com.android.systemui.unfold.UnfoldLatencyTracker;
 import com.android.systemui.unfold.util.NaturalRotationUnfoldProgressProvider;
@@ -139,6 +141,8 @@ public interface SysUIComponent {
         getMediaTttChipControllerReceiver();
         getMediaTttCommandLineHelper();
         getUnfoldLatencyTracker().init();
+        getFoldStateLoggingProvider().ifPresent(FoldStateLoggingProvider::init);
+        getFoldStateLogger().ifPresent(FoldStateLogger::init);
     }
 
     /**
@@ -165,6 +169,18 @@ public interface SysUIComponent {
     @SysUISingleton
     UnfoldLatencyTracker getUnfoldLatencyTracker();
 
+    /**
+     * Creates a FoldStateLoggingProvider.
+     */
+    @SysUISingleton
+    Optional<FoldStateLoggingProvider> getFoldStateLoggingProvider();
+
+    /**
+     * Creates a FoldStateLogger.
+     */
+    @SysUISingleton
+    Optional<FoldStateLogger> getFoldStateLogger();
+
     /**
      * Main dependency providing module.
      */

packages/SystemUI/src/com/android/systemui/unfold/FoldStateLogger.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2022 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.systemui.unfold
+
+import com.android.internal.util.FrameworkStatsLog
+
+/** Logs fold state changes. */
+class FoldStateLogger(private val foldStateLoggingProvider: FoldStateLoggingProvider) :
+    FoldStateLoggingProvider.FoldStateLoggingListener {
+
+    fun init() {
+        foldStateLoggingProvider.addCallback(this)
+    }
+
+    override fun onFoldUpdate(foldStateUpdate: FoldStateChange) {
+        FrameworkStatsLog.write(
+            FrameworkStatsLog.FOLD_STATE_DURATION_REPORTED,
+            foldStateUpdate.previous,
+            foldStateUpdate.current,
+            foldStateUpdate.dtMillis)
+    }
+}

packages/SystemUI/src/com/android/systemui/unfold/UnfoldTransitionModule.kt

@@ -100,6 +100,15 @@ class UnfoldTransitionModule {
             FoldStateLoggingProviderImpl(foldStateProvider, SystemClockImpl())
         }
 
+    @Provides
+    @Singleton
+    fun providesFoldStateLogger(
+        optionalFoldStateLoggingProvider: Optional<FoldStateLoggingProvider>
+    ): Optional<FoldStateLogger> =
+        optionalFoldStateLoggingProvider.map { FoldStateLoggingProvider ->
+            FoldStateLogger(FoldStateLoggingProvider)
+        }
+
     @Provides
     @Singleton
     fun provideUnfoldTransitionConfig(context: Context): UnfoldTransitionConfig =