Move TaskRunner and SynchronizedQueue to details

Bug: 36433220
Test: compiles
Test: hidl_test
Test: libhidl_test
Change-Id: Ia48bf9abba293f177ec2f6cfab49da5422a59b82
diff --git a/test_main.cpp b/test_main.cpp
index 7ff8ae3..308a8cc 100644
--- a/test_main.cpp
+++ b/test_main.cpp
@@ -255,7 +255,7 @@
 }
 
 TEST_F(LibHidlTest, TaskRunnerTest) {
-    using android::hardware::TaskRunner;
+    using android::hardware::details::TaskRunner;
     TaskRunner tr;
     bool flag = false;
     tr.push([&] {