Move TaskRunner and SynchronizedQueue to details

Bug: 36433220
Test: compiles
Test: hidl_test
Test: libhidl_test
Change-Id: Ia48bf9abba293f177ec2f6cfab49da5422a59b82
diff --git a/base/include/hidl/SynchronizedQueue.h b/base/include/hidl/SynchronizedQueue.h
index 80123ba..1813130 100644
--- a/base/include/hidl/SynchronizedQueue.h
+++ b/base/include/hidl/SynchronizedQueue.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef ANDROID_SYNCHRONIZED_QUEUE_H
-#define ANDROID_SYNCHRONIZED_QUEUE_H
+#ifndef ANDROID_HIDL_SYNCHRONIZED_QUEUE_H
+#define ANDROID_HIDL_SYNCHRONIZED_QUEUE_H
 
 #include <condition_variable>
 #include <mutex>
@@ -24,6 +24,7 @@
 
 namespace android {
 namespace hardware {
+namespace details {
 /* Threadsafe queue.
  */
 template <typename T>
@@ -100,7 +101,8 @@
     mQueueLimit = limit;
 }
 
+} // namespace details
 } // namespace hardware
 } // namespace android
 
-#endif
+#endif // ANDROID_HIDL_SYNCHRONIZED_QUEUE_H