SF: Move relevant scheduler files into one directory.

Scheduler (see go/surface-flinger-scheduler) is going to live in its own
directory. This CL just moves the relevant files into that directory. No
changes to business logic.

Test: all SF tests pass.
Change-Id: Iff0717f9867316b28e68fd8311bd9fdc4e029951
diff --git a/services/surfaceflinger/tests/unittests/EventThreadTest.cpp b/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
index 19747bd..fb3b7a2 100644
--- a/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
+++ b/services/surfaceflinger/tests/unittests/EventThreadTest.cpp
@@ -25,7 +25,7 @@
 #include <utils/Errors.h>
 
 #include "AsyncCallRecorder.h"
-#include "EventThread.h"
+#include "Scheduler/EventThread.h"
 
 using namespace std::chrono_literals;
 using namespace std::placeholders;