Report correct userId in onUserMayRequestUnlock.

obtainMessage with two arguments will set the user id as the object, but
this value is retrieved as msg.arg1. We need to call obtainMessage with
three arguments instead to make the second argument the userId. Thir
third argument will be ignored by the receiver.

Test: atest TrustTests:UserUnlockRequestTest
Bug: b/278323473
Change-Id: Ie08c643f9fb5fbbe7f107a1f267074805ddc500b

services/core/java/com/android/server/trust/TrustManagerService.java

@@ -1504,7 +1504,7 @@ public class TrustManagerService extends SystemService {
         @Override
         public void reportUserMayRequestUnlock(int userId) throws RemoteException {
             enforceReportPermission();
-            mHandler.obtainMessage(MSG_USER_MAY_REQUEST_UNLOCK, userId).sendToTarget();
+            mHandler.obtainMessage(MSG_USER_MAY_REQUEST_UNLOCK, userId, /*arg2=*/ 0).sendToTarget();
         }
 
         @Override

tests/TrustTests/src/android/trust/test/UserUnlockRequestTest.kt

@@ -79,6 +79,16 @@ class UserUnlockRequestTest {
             .isEqualTo(oldCount + 1)
     }
 
+    @Test
+    fun reportUserMayRequestUnlock_differentUserId_doesNotPropagateToAgent() {
+        val oldCount = trustAgentRule.agent.onUserMayRequestUnlockCallCount
+        trustManager.reportUserMayRequestUnlock(userId + 1)
+        await()
+
+        assertThat(trustAgentRule.agent.onUserMayRequestUnlockCallCount)
+            .isEqualTo(oldCount)
+    }
+
     companion object {
         private const val TAG = "UserUnlockRequestTest"
         private fun await() = Thread.sleep(250)