[Catalyst] Implement metrics/tags for "Data Saver"

Bug: 388061003
Flag: com.android.settings.flags.catalyst
Test: devtool
Change-Id: I240e7a1cf5a27dfd686746d0c754d74c1c95d1ab

src/com/android/settings/contract/SettingsContract.kt

@@ -32,3 +32,6 @@ const val KEY_LOCATION = SettingsSlicesContract.KEY_LOCATION
 
 /** Contract key for the "Wi-fi" setting. */
 const val KEY_WIFI = SettingsSlicesContract.KEY_WIFI
+
+/** Contract key for the "Use Data Saver" setting. */
+const val KEY_DATA_SAVER = "data_saver"

src/com/android/settings/datausage/DataSaverMainSwitchPreference.kt

@@ -17,8 +17,11 @@
 package com.android.settings.datausage
 
 import android.Manifest
+import android.app.settings.SettingsEnums.ACTION_DATA_SAVER_MODE
 import android.content.Context
+import com.android.settings.PreferenceActionMetricsProvider
 import com.android.settings.R
+import com.android.settings.contract.KEY_DATA_SAVER
 import com.android.settings.widget.MainSwitchBarMetadata
 import com.android.settingslib.datastore.AbstractKeyedDataObservable
 import com.android.settingslib.datastore.KeyValueStore
@@ -28,7 +31,8 @@ import com.android.settingslib.metadata.PreferenceLifecycleProvider
 import com.android.settingslib.metadata.ReadWritePermit
 import com.android.settingslib.metadata.SensitivityLevel
 
-class DataSaverMainSwitchPreference : MainSwitchBarMetadata, PreferenceLifecycleProvider {
+class DataSaverMainSwitchPreference :
+    MainSwitchBarMetadata, PreferenceActionMetricsProvider, PreferenceLifecycleProvider {
 
     override val key
         get() = KEY
@@ -39,6 +43,11 @@ class DataSaverMainSwitchPreference : MainSwitchBarMetadata, PreferenceLifecycle
     override val disableWidgetOnCheckedChanged: Boolean
         get() = false
 
+    override val preferenceActionMetrics: Int
+        get() = ACTION_DATA_SAVER_MODE
+
+    override fun tags(context: Context) = arrayOf(KEY_DATA_SAVER)
+
     override fun storage(context: Context) = createDataStore(context)
 
     override fun getReadPermissions(context: Context) =