Re-add the wildcard instance name for ISharedSecret in FCM 202504

It was added in aosp/3038254 and removed in a merge conflict resolution in ag/27273371

Test: m
Bug: 346861728
Change-Id: Ie1d3897697e40fca1067442348d400bf6bdee880
diff --git a/compatibility_matrices/compatibility_matrix.202504.xml b/compatibility_matrices/compatibility_matrix.202504.xml
index 3e5b74a..f65117d 100644
--- a/compatibility_matrices/compatibility_matrix.202504.xml
+++ b/compatibility_matrices/compatibility_matrix.202504.xml
@@ -530,6 +530,7 @@
             <name>ISharedSecret</name>
             <instance>default</instance>
             <instance>strongbox</instance>
+            <regex-instance>.*</regex-instance>
         </interface>
     </hal>
     <hal format="aidl">