Report which files are in the dependency graph for dist builds.

Bug: 383124666
Test: m dist and verify
Change-Id: Icc95327e8288bf1fbed86cd3d894f72229967155
diff --git a/ui/build/Android.bp b/ui/build/Android.bp
index dc1abd9..cd93f87 100644
--- a/ui/build/Android.bp
+++ b/ui/build/Android.bp
@@ -54,6 +54,7 @@
         "config.go",
         "context.go",
         "staging_snapshot.go",
+        "source_inputs.go",
         "dumpvars.go",
         "environment.go",
         "exec.go",