Fix build and address nits from aosp/1172102

Fixing merge conflict and nits pending from aosp/1172102.

Bug: 132880619
TBR: hjd
Change-Id: I666bc36263f97c84bb009a8a12e0737a12530344
diff --git a/Android.bp b/Android.bp
index dbe623c..6cf539f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -6093,6 +6093,7 @@
     ":perfetto_include_perfetto_ext_tracing_ipc_ipc",
     ":perfetto_include_perfetto_protozero_protozero",
     ":perfetto_include_perfetto_tracing_core_core",
+    ":perfetto_include_perfetto_tracing_core_forward_decls",
     ":perfetto_include_perfetto_tracing_tracing",
     ":perfetto_protos_perfetto_common_cpp_gen",
     ":perfetto_protos_perfetto_common_lite_gen",