fuchsia: Register trace provider in HostConnection initialization.

Trace provider (https://fuchsia.dev/fuchsia-src/development/tracing/tutorial/registering-a-trace-provider)
is required to register with trace manager in order to participate
in tracing. This CL adds TraceProviderFuchsia class, registering a
global tracing provider in HostConnction::connect().

TEST=fx traceutil record; verified goldfish Vulkan events appeared.
Fixed: 65551

Change-Id: Ic87397c895e01b9af3d2c52819a3637d936f649f
diff --git a/system/OpenglSystemCommon/TraceProviderFuchsia.h b/system/OpenglSystemCommon/TraceProviderFuchsia.h
new file mode 100644
index 0000000..86b8bdc
--- /dev/null
+++ b/system/OpenglSystemCommon/TraceProviderFuchsia.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __COMMON_TRACE_PROVIDER_FUCHSIA_H
+#define __COMMON_TRACE_PROVIDER_FUCHSIA_H
+
+#ifndef __Fuchsia__
+#error "TraceProviderFuchsia is only supported on Fuchsia!"
+#endif  // __Fuchsia__
+
+#include <memory>
+
+#include <lib/async-loop/cpp/loop.h>
+#include <lib/trace-provider/provider.h>
+
+class TraceProviderFuchsia {
+public:
+    TraceProviderFuchsia();
+    ~TraceProviderFuchsia();
+
+    bool Initialize();
+
+private:
+    async::Loop mLoop;
+    std::unique_ptr<trace::TraceProvider> mTraceProvider;
+};
+
+#endif  // __COMMON_TRACE_PROVIDER_FUCHSIA_H
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