Add Shared Secret to the compatibility matrix.

Test: Build
Change-Id: Iadac3b304a9b8eba69f6fb2fe7aec41f7200a613
diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index e897c07..d39e339 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -465,6 +465,13 @@
             <instance>default</instance>
         </interface>
     </hal>
+    <hal format="aidl" optional="true">
+        <name>android.hardware.security.sharedsecret</name>
+        <interface>
+            <name>ISharedSecret</name>
+            <instance>default</instance>
+        </interface>
+    </hal>
     <hal format="hidl" optional="true">
         <name>android.hardware.sensors</name>
         <version>1.0</version>