Fix ATRACE_TAG redefinition in SysTrace.h

Split SysTrace.h into SysTrace.cpp to avoid defining ATRACE_TAG
in the clients of SysTrace.h

This is in preparation to land aosp/2190022

Test: m
Bug: 161393989
Change-Id: I0ed94c9f66043aa83a59e8042ec9e61ee47db0f2
diff --git a/cmds/idmap2/include/idmap2/SysTrace.h b/cmds/idmap2/include/idmap2/SysTrace.h
index 19b4353..fcadf96 100644
--- a/cmds/idmap2/include/idmap2/SysTrace.h
+++ b/cmds/idmap2/include/idmap2/SysTrace.h
@@ -17,8 +17,6 @@
 #ifndef IDMAP2_INCLUDE_IDMAP2_SYSTRACE_H_
 #define IDMAP2_INCLUDE_IDMAP2_SYSTRACE_H_
 
-#define ATRACE_TAG ATRACE_TAG_RRO
-
 #include <sstream>
 #include <vector>
 
@@ -29,16 +27,12 @@
 
 class ScopedTraceNoStart {
  public:
-  ~ScopedTraceNoStart() {
-    ATRACE_END();
-  }
+  ~ScopedTraceNoStart();
 };
 
 class ScopedTraceMessageHelper {
  public:
-  ~ScopedTraceMessageHelper() {
-    ATRACE_BEGIN(buffer_.str().c_str());
-  }
+  ~ScopedTraceMessageHelper();
 
   std::ostream& stream() {
     return buffer_;
@@ -48,9 +42,12 @@
   std::ostringstream buffer_;
 };
 
+bool atrace_enabled();
+
 #define SYSTRACE                                               \
   android::idmap2::utils::ScopedTraceNoStart _trace##__LINE__; \
-  (ATRACE_ENABLED()) && android::idmap2::utils::ScopedTraceMessageHelper().stream()
+  android::idmap2::utils::atrace_enabled() \
+  && android::idmap2::utils::ScopedTraceMessageHelper().stream()
 
 #else
 
diff --git a/cmds/idmap2/libidmap2/SysTrace.cpp b/cmds/idmap2/libidmap2/SysTrace.cpp
new file mode 100644
index 0000000..55d45b7
--- /dev/null
+++ b/cmds/idmap2/libidmap2/SysTrace.cpp
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2022 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.
+ */
+
+#define ATRACE_TAG ATRACE_TAG_RRO
+
+#include "idmap2/SysTrace.h"
+
+#ifdef __ANDROID__
+namespace android::idmap2::utils {
+
+ScopedTraceNoStart::~ScopedTraceNoStart() {
+    ATRACE_END();
+};
+
+ScopedTraceMessageHelper::~ScopedTraceMessageHelper() {
+    ATRACE_BEGIN(buffer_.str().c_str());
+}
+
+bool atrace_enabled() {
+    return ATRACE_ENABLED();
+}
+}  // namespace android::idmap2::utils
+#endif