Parse proto tombstones.

Bug: http://b/159164105
Test: manual
Change-Id: I8b85d8eeb343f390567b9d11bafcaa0d9aebddc7
diff --git a/Android.bp b/Android.bp
index 6a0bdc3..6a2bd95 100644
--- a/Android.bp
+++ b/Android.bp
@@ -678,6 +678,7 @@
     srcs: [
         ":ipconnectivity-proto-src",
         ":libstats_atom_enum_protos",
+        ":libtombstone_proto-src",
         "core/proto/**/*.proto",
         "libs/incident/**/*.proto",
     ],