[fidl] add missing FIDL deps for fuchsia.modular.internal

Those deps contain FIDL symbols referenced within fuchsia.modular.internal. Somehow the C++ build works despite the missing deps, but it triggers an error if referenced from Rust.

LE-663

Tested: referenced from WIP Rust CL for Voila. Once the CL is landed it will prevent regressions.
Change-Id: I8073448300e922328553b75f0b9af9a73d81acc2
diff --git a/public/fidl/fuchsia.modular.internal/BUILD.gn b/public/fidl/fuchsia.modular.internal/BUILD.gn
index 3391903..2a0645f 100644
--- a/public/fidl/fuchsia.modular.internal/BUILD.gn
+++ b/public/fidl/fuchsia.modular.internal/BUILD.gn
@@ -14,6 +14,10 @@
   ]
   deps = [
     "//garnet/public/fidl/fuchsia.auth",
+    "//garnet/public/fidl/fuchsia.ui.policy",
+    "//garnet/public/fidl/fuchsia.ui.viewsv1token",
+    "//peridot/public/fidl/fuchsia.ledger",
     "//peridot/public/fidl/fuchsia.modular",
+    "//peridot/public/fidl/fuchsia.modular.auth",
   ]
 }