Allow setting doze timeouts based on system feature

BUG: 25678232
Change-Id: Ic9c8e5001a9202242308effb38de879b5f30bd36
diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index d8937b4..b2e479a 100755
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -7699,6 +7699,16 @@
         public static final String DEVICE_IDLE_CONSTANTS = "device_idle_constants";
 
         /**
+         * Device Idle (Doze) specific settings for watches. See {@code #DEVICE_IDLE_CONSTANTS}
+         *
+         * <p>
+         * Type: string
+         * @hide
+         * @see com.android.server.DeviceIdleController.Constants
+         */
+        public static final String DEVICE_IDLE_CONSTANTS_WATCH = "device_idle_constants_watch";
+
+        /**
          * App standby (app idle) specific settings.
          * This is encoded as a key=value list, separated by commas. Ex:
          *