Replace base::MessageLoopCurrent* by base::Current*Thread

Make changes necessary for recent uprev of libchrome to r822064.

Bug: 187086497
Tag: #floss
Test: atest --host bluetooth_test_gd
Change-Id: I63f954c1ce5e0bf455e1da1e258d4a8b88fcfc9d

system/include/abstract_message_loop.h

@@ -21,7 +21,11 @@
  * the old libchrome version so use the basic messageloop where that's required.
  * Elsewhere, use the SingleThreadTaskExecutor instead.
  */
+#if BASE_VER >= 822064
+#include <base/task/current_thread.h>
+#else
 #include <base/message_loop/message_loop_current.h>
+#endif
 #include <base/message_loop/message_pump.h>
 #include <base/task/single_thread_task_executor.h>
 #include <base/test/task_environment.h>