Add SSCP fragment to sdk definition of AppSearch.

Bug: 223592962
Test: presubmit
Change-Id: Ic0c8bba8f435156e7442eaf8ea9e4e5f3ca37e70
diff --git a/Android.bp b/Android.bp
index 5d727a2..c6fa59a 100644
--- a/Android.bp
+++ b/Android.bp
@@ -34,6 +34,7 @@
 sdk {
     name: "appsearch-sdk",
     bootclasspath_fragments: ["com.android.appsearch-bootclasspath-fragment"],
+    systemserverclasspath_fragments: ["com.android.appsearch-systemserverclasspath-fragment"],
 }
 
 apex {