Add bazel_metrics to py proto export.

Test: build/bazel/scripts/analyze_build
Change-Id: Ied3e6d5a1d65ec31d704ac3cef6e7c74397333bf
diff --git a/ui/metrics/BUILD.bazel b/ui/metrics/BUILD.bazel
index 2dc1ab6..ca39c59 100644
--- a/ui/metrics/BUILD.bazel
+++ b/ui/metrics/BUILD.bazel
@@ -23,6 +23,7 @@
 proto_library(
     name = "metrics-proto",
     srcs = [
+        "bazel_metrics_proto/bazel_metrics.proto",
         "bp2build_metrics_proto/bp2build_metrics.proto",
         "metrics_proto/metrics.proto",
     ],