Expose the merged config proto in the bazel build.

Also makes all other root protos public.

Change-Id: I1646247998aaa6814af2a59d03f2e9dd89336c64
diff --git a/BUILD b/BUILD
index b15e547..374a713 100644
--- a/BUILD
+++ b/BUILD
@@ -1270,6 +1270,14 @@
     ],
 )
 
+# GN target: //protos/perfetto/config:merged_config
+perfetto_cc_proto_library(
+    name = "protos_perfetto_config_merged_config",
+    deps = [
+        ":protos_perfetto_config_merged_config_protos",
+    ],
+)
+
 # GN target: //protos/perfetto/common:lite
 perfetto_cc_proto_library(
     name = "protos_perfetto_common_lite",
@@ -1278,6 +1286,17 @@
     ],
 )
 
+# GN target: //protos/perfetto/config:merged_config
+perfetto_proto_library(
+    name = "protos_perfetto_config_merged_config_protos",
+    srcs = [
+        "protos/perfetto/config/perfetto_config.proto",
+    ],
+    visibility = [
+        "//visibility:public",
+    ],
+)
+
 # GN target: //protos/perfetto/trace/ftrace:lite
 perfetto_cc_proto_library(
     name = "protos_perfetto_trace_ftrace_lite",
@@ -1687,6 +1706,9 @@
     srcs = [
         "protos/perfetto/trace/perfetto_trace.proto",
     ],
+    visibility = [
+        "//visibility:public",
+    ],
 )
 
 # GN target: //protos/perfetto/config/profiling:zero
@@ -1843,6 +1865,9 @@
     srcs = [
         "protos/perfetto/metrics/metrics.proto",
     ],
+    visibility = [
+        "//visibility:public",
+    ],
     deps = [
         ":protos_perfetto_metrics_android_protos",
     ],