[cts] fix testGetNamesForUids_valid

CtsShim now uses sharedUserId per ag/15985451.

BUG: 232559012
Test: atest CtsContentTestCases:android.content.pm.cts.PackageManagerTest#testGetNamesForUids_valid
Change-Id: I00bf0cbe5ab8652271814cf4969ea65b5fcf5b52
diff --git a/tests/tests/content/src/android/content/pm/cts/PackageManagerTest.java b/tests/tests/content/src/android/content/pm/cts/PackageManagerTest.java
index bff425b..51286e0 100644
--- a/tests/tests/content/src/android/content/pm/cts/PackageManagerTest.java
+++ b/tests/tests/content/src/android/content/pm/cts/PackageManagerTest.java
@@ -991,7 +991,7 @@
         assertEquals(3, result.length);
         assertEquals("shared:android.uid.system", result[0]);
         assertEquals(null, result[1]);
-        assertEquals("com.android.cts.ctsshim", result[2]);
+        assertEquals("shared:com.android.cts.ctsshim", result[2]);
     }
 
     @Test