Add @UnsupportedAppUsage annotations

For packages:
  android.security.net.config
  android.security.keystore
  android.security.keymaster
  android.security

This is an automatically generated CL. See go/UnsupportedAppUsage
for more details.

Exempted-From-Owner-Approval: Mechanical changes to the codebase
which have been approved by Android API council and announced on
android-eng@

Bug: 110868826
Test: m
Change-Id: Ifed4da56531195f64fd53d84f14b4e8298843b2c
Merged-In: I7762dd647bede8abc9be2c538af3a3a99a25a73e
diff --git a/keystore/java/android/security/GateKeeper.java b/keystore/java/android/security/GateKeeper.java
index 03df5de..a50ff79 100644
--- a/keystore/java/android/security/GateKeeper.java
+++ b/keystore/java/android/security/GateKeeper.java
@@ -16,6 +16,7 @@
 
 package android.security;
 
+import android.annotation.UnsupportedAppUsage;
 import android.content.Context;
 import android.os.RemoteException;
 import android.os.ServiceManager;
@@ -42,6 +43,7 @@
         return service;
     }
 
+    @UnsupportedAppUsage
     public static long getSecureUserId() throws IllegalStateException {
         try {
             return getService().getSecureUserId(UserHandle.myUserId());