Add new API to retrieve app names in a batch

Change-Id: I57e5c132bc58a32d70007a7a105775b526ff7bb9
Fixes: 62805090
Test: cts-tradefed run commandAndExit cts-dev -m CtsContentTestCases -t android.content.pm.cts.PackageManagerTest#testGetNamesForUids_null
Test: cts-tradefed run commandAndExit cts-dev -m CtsContentTestCases -t android.content.pm.cts.PackageManagerTest#testGetNamesForUids_empty
Test: cts-tradefed run commandAndExit cts-dev -m CtsContentTestCases -t android.content.pm.cts.PackageManagerTest#testGetNamesForUids_valid
diff --git a/test-runner/src/android/test/mock/MockPackageManager.java b/test-runner/src/android/test/mock/MockPackageManager.java
index 3cb1f39..68fd825 100644
--- a/test-runner/src/android/test/mock/MockPackageManager.java
+++ b/test-runner/src/android/test/mock/MockPackageManager.java
@@ -321,6 +321,11 @@
         throw new UnsupportedOperationException();
     }
 
+    @Override
+    public String[] getNamesForUids(int uid[]) {
+        throw new UnsupportedOperationException();
+    }
+
     /**
      * @hide - to match hiding in superclass
      */