Add setting for enabling CPU frequency scaling.

Bug: 74018496
Change-Id: I97a6828b6248ae6850e615a4840469420dbaf918

core/java/android/provider/Settings.java

@@ -12232,6 +12232,16 @@ public final class Settings {
         public static final String ZRAM_ENABLED =
                 "zram_enabled";
 
+        /**
+         * Whether we have enable CPU frequency scaling for this device.
+         * For Wear, default is disable.
+         *
+         * The value is "1" for enable, "0" for disable.
+         * @hide
+         */
+        public static final String CPU_SCALING_ENABLED =
+                "cpu_frequency_scaling_enabled";
+
         /**
          * Configuration flags for smart replies in notifications.
          * This is encoded as a key=value list, separated by commas. Ex:

core/tests/coretests/src/android/provider/SettingsBackupTest.java

@@ -169,6 +169,7 @@ public class SettingsBackupTest {
                     Settings.Global.CONNECTIVITY_SAMPLING_INTERVAL_IN_SECONDS,
                     Settings.Global.CONTACT_METADATA_SYNC_ENABLED,
                     Settings.Global.CONTACTS_DATABASE_WAL_ENABLED,
+                    Settings.Global.CPU_SCALING_ENABLED,
                     Settings.Global.DATA_ACTIVITY_TIMEOUT_MOBILE,
                     Settings.Global.DATA_ACTIVITY_TIMEOUT_WIFI,
                     Settings.Global.DATABASE_CREATION_BUILDID,

services/java/com/android/server/SystemServer.java

@@ -196,6 +196,8 @@ public final class SystemServer {
             "com.android.server.search.SearchManagerService$Lifecycle";
     private static final String THERMAL_OBSERVER_CLASS =
             "com.google.android.clockwork.ThermalObserver";
+    private static final String WEAR_CONFIG_SERVICE_CLASS =
+            "com.google.android.clockwork.WearConfigManagerService";
     private static final String WEAR_CONNECTIVITY_SERVICE_CLASS =
             "com.android.clockwork.connectivity.WearConnectivityService";
     private static final String WEAR_SIDEKICK_SERVICE_CLASS =
@@ -1535,6 +1537,10 @@ public final class SystemServer {
         }
 
         if (isWatch) {
+            traceBeginAndSlog("StartWearConfigService");
+            mSystemServiceManager.startService(WEAR_CONFIG_SERVICE_CLASS);
+            traceEnd();
+
             traceBeginAndSlog("StartWearConnectivityService");
             mSystemServiceManager.startService(WEAR_CONNECTIVITY_SERVICE_CLASS);
             traceEnd();