Add replicaisland to Whitelist

Bug 5898230

replicaisland is build using testkeys and integrated into CTS,
so add this to the whitelist.

Change-Id: I69adf134ddbbed9c1fd74b96266cdc840aab16fa
diff --git a/tests/tests/security/src/android/security/cts/PackageSignatureTest.java b/tests/tests/security/src/android/security/cts/PackageSignatureTest.java
index 5670cdd..f278b0f 100644
--- a/tests/tests/security/src/android/security/cts/PackageSignatureTest.java
+++ b/tests/tests/security/src/android/security/cts/PackageSignatureTest.java
@@ -86,7 +86,10 @@
             "android.core.tests.runner",
 
             // Wifi test utility used by Tradefed...
-            "com.android.tradefed.utils.wifi"
+            "com.android.tradefed.utils.wifi",
+
+            // Game used for CTS testing...
+            "com.replica.replicaisland"
             ));
 
     private boolean isWhitelistedPackage(String packageName) {