Clarify usage of LOW_POWER_STANDBY_FEATURE_WAKE_ON_LAN

Bug: 269254783
Test: -
Change-Id: Ic6b552db46cbcb0f1088e923903cc993dd429ef4
diff --git a/core/java/android/os/PowerManager.java b/core/java/android/os/PowerManager.java
index c021cad..03c32d70 100644
--- a/core/java/android/os/PowerManager.java
+++ b/core/java/android/os/PowerManager.java
@@ -2982,6 +2982,12 @@
     /**
      * Signals that wake-on-lan/wake-on-wlan is allowed in Low Power Standby.
      *
+     * <p>If Low Power Standby is enabled ({@link #isLowPowerStandbyEnabled()}),
+     * wake-on-lan/wake-on-wlan may not be available while in standby.
+     * Use {@link #isAllowedInLowPowerStandby(String)} to determine whether the device allows this
+     * feature to be used during Low Power Standby with the currently active Low Power Standby
+     * policy.
+     *
      * @see #isAllowedInLowPowerStandby(String)
      */
     public static final String LOW_POWER_STANDBY_FEATURE_WAKE_ON_LAN =