Update doc of proxyAppPackageName

Fixes: 151088537

Test: doc only and builds
Change-Id: If0c4c6d879a1a35293739838702a33ec770b0ed3
diff --git a/current.txt b/current.txt
index 5f5758c..e001e66 100644
--- a/current.txt
+++ b/current.txt
@@ -589,6 +589,7 @@
 a05277065c28ebecd58118bd240fb8c55757361e8648c01f7c4dacdb7f2a95dc android.hardware.camera.metadata@3.3::types
 9cb3df2bde2c6cd5fd96b7c41555420cacd7e276a556c684af91b7461c86460f android.hardware.gnss@1.0::IGnssCallback
 af334f1fc85c62b343f84b74d0495eed6f495f7fecedb53463db10c202310058 android.hardware.gnss.measurement_corrections@1.0::types
+33a6b20c43af00fdfb305df891bc5911c06d9a9130b912759649932e5a4a6e6d android.hardware.gnss.visibility_control@1.0::IGnssVisibilityControlCallback
 bceee81ec1b59324abd05932b5620fda5a6589597c9cb3953ba7f3ea02cccd3e android.hardware.camera.provider@2.4::ICameraProvider
 2ce820dc4f3c6d85721b65150ed2157c6e2e2055f866fb6c6ba4790f14408d66 android.hardware.camera.provider@2.4::ICameraProviderCallback
 b69a7615c508acf5c5201efd1bfa3262167874fc3594e2db5a3ff93addd8ac75 android.hardware.keymaster@4.0::IKeymasterDevice
diff --git a/gnss/visibility_control/1.0/IGnssVisibilityControlCallback.hal b/gnss/visibility_control/1.0/IGnssVisibilityControlCallback.hal
index 5a582c2..5ee2923 100644
--- a/gnss/visibility_control/1.0/IGnssVisibilityControlCallback.hal
+++ b/gnss/visibility_control/1.0/IGnssVisibilityControlCallback.hal
@@ -82,6 +82,9 @@
         /**
          * Package name of the Android proxy application representing the non-framework
          * entity that requested location. Set to empty string if unknown.
+         *
+         * For user-initiated emergency use cases, this field must be set to empty string
+         * and the inEmergencyMode field must be set to true.
          */
         string proxyAppPackageName;
 
@@ -157,4 +160,4 @@
      * @return success True if the framework determines that the device is in emergency session.
      */
     isInEmergencySession() generates (bool success);
-};
\ No newline at end of file
+};