PackageManager: update documentation for FEATURE_WIFI_PASSPOINT

Bug: 64331342
Test: build
Change-Id: I94937e8ff921b01c62e6b478b3ee6e581e38408e
diff --git a/core/java/android/content/pm/PackageManager.java b/core/java/android/content/pm/PackageManager.java
index f6eaed4..ea03727 100644
--- a/core/java/android/content/pm/PackageManager.java
+++ b/core/java/android/content/pm/PackageManager.java
@@ -2295,7 +2295,9 @@
 
     /**
      * Feature for {@link #getSystemAvailableFeatures} and
-     * {@link #hasSystemFeature}: The device supports Wi-Fi Passpoint.
+     * {@link #hasSystemFeature}: The device supports Wi-Fi Passpoint and all
+     * Passpoint related APIs in {@link WifiManager} are supported. Refer to
+     * {@link WifiManager#addOrUpdatePasspointConfiguration} for more info.
      */
     @SdkConstant(SdkConstantType.FEATURE)
     public static final String FEATURE_WIFI_PASSPOINT = "android.hardware.wifi.passpoint";