Protos: A message to store benchmark metadata

Telemetry stores some metadata about the trace (eg. benchmark/story
name, custom labels, etc.) after running a benchmark. This CL adds
a message to store this metadata in proto format.

Bug: 132682848
Change-Id: I351ed7c425e5d1b186bf10a348a04f5d665ab60e
diff --git a/Android.bp b/Android.bp
index 05add93..7cbca62 100644
--- a/Android.bp
+++ b/Android.bp
@@ -1208,6 +1208,7 @@
 genrule {
   name: "perfetto_protos_perfetto_trace_chrome_lite_gen",
   srcs: [
+    "protos/perfetto/trace/chrome/chrome_benchmark_metadata.proto",
     "protos/perfetto/trace/chrome/chrome_trace_event.proto",
   ],
   tools: [
@@ -1215,6 +1216,7 @@
   ],
   cmd: "mkdir -p $(genDir)/external/perfetto/protos && $(location aprotoc) --cpp_out=$(genDir)/external/perfetto/protos --proto_path=external/perfetto/protos $(in)",
   out: [
+    "external/perfetto/protos/perfetto/trace/chrome/chrome_benchmark_metadata.pb.cc",
     "external/perfetto/protos/perfetto/trace/chrome/chrome_trace_event.pb.cc",
   ],
 }
@@ -1223,6 +1225,7 @@
 genrule {
   name: "perfetto_protos_perfetto_trace_chrome_lite_gen_headers",
   srcs: [
+    "protos/perfetto/trace/chrome/chrome_benchmark_metadata.proto",
     "protos/perfetto/trace/chrome/chrome_trace_event.proto",
   ],
   tools: [
@@ -1230,6 +1233,7 @@
   ],
   cmd: "mkdir -p $(genDir)/external/perfetto/protos && $(location aprotoc) --cpp_out=$(genDir)/external/perfetto/protos --proto_path=external/perfetto/protos $(in)",
   out: [
+    "external/perfetto/protos/perfetto/trace/chrome/chrome_benchmark_metadata.pb.h",
     "external/perfetto/protos/perfetto/trace/chrome/chrome_trace_event.pb.h",
   ],
   export_include_dirs: [
@@ -1241,6 +1245,7 @@
 genrule {
   name: "perfetto_protos_perfetto_trace_chrome_zero_gen",
   srcs: [
+    "protos/perfetto/trace/chrome/chrome_benchmark_metadata.proto",
     "protos/perfetto/trace/chrome/chrome_trace_event.proto",
   ],
   tools: [
@@ -1249,6 +1254,7 @@
   ],
   cmd: "mkdir -p $(genDir)/external/perfetto/protos && $(location aprotoc) --cpp_out=$(genDir)/external/perfetto/protos --proto_path=external/perfetto/protos --plugin=protoc-gen-plugin=$(location perfetto_src_protozero_protoc_plugin_protoc_plugin___gn_standalone_toolchain_gcc_like_host_) --plugin_out=wrapper_namespace=pbzero:$(genDir)/external/perfetto/protos $(in)",
   out: [
+    "external/perfetto/protos/perfetto/trace/chrome/chrome_benchmark_metadata.pbzero.cc",
     "external/perfetto/protos/perfetto/trace/chrome/chrome_trace_event.pbzero.cc",
   ],
 }
@@ -1257,6 +1263,7 @@
 genrule {
   name: "perfetto_protos_perfetto_trace_chrome_zero_gen_headers",
   srcs: [
+    "protos/perfetto/trace/chrome/chrome_benchmark_metadata.proto",
     "protos/perfetto/trace/chrome/chrome_trace_event.proto",
   ],
   tools: [
@@ -1265,6 +1272,7 @@
   ],
   cmd: "mkdir -p $(genDir)/external/perfetto/protos && $(location aprotoc) --cpp_out=$(genDir)/external/perfetto/protos --proto_path=external/perfetto/protos --plugin=protoc-gen-plugin=$(location perfetto_src_protozero_protoc_plugin_protoc_plugin___gn_standalone_toolchain_gcc_like_host_) --plugin_out=wrapper_namespace=pbzero:$(genDir)/external/perfetto/protos $(in)",
   out: [
+    "external/perfetto/protos/perfetto/trace/chrome/chrome_benchmark_metadata.pbzero.h",
     "external/perfetto/protos/perfetto/trace/chrome/chrome_trace_event.pbzero.h",
   ],
   export_include_dirs: [