Add federatedcompute stubs and bootclasspath fragment

Test: TH
Bug: 244640209
Change-Id: I364cbe5303333f1e70585840c1bda178135fe22d
diff --git a/ApiDocs.bp b/ApiDocs.bp
index c87ecde..4bba338 100644
--- a/ApiDocs.bp
+++ b/ApiDocs.bp
@@ -84,6 +84,7 @@
         ":framework-connectivity-sources",
         ":framework-bluetooth-sources",
         ":framework-connectivity-tiramisu-updatable-sources",
+        ":framework-federatedcompute-sources",
         ":framework-graphics-srcs",
         ":framework-mediaprovider-sources",
         ":framework-nearby-sources",