drm_hwcomposer: move header files into source directory

... to improve navigation between source/header file.
Unnecessary dependencies also removed.

Signed-off-by: Roman Stratiienko <r.stratiienko@gmail.com>
Change-Id: I2c3bf993b8c5f356490433fd94e90011487a1276
diff --git a/tests/worker_test.cpp b/tests/worker_test.cpp
index 82523f0..ba89b6f 100644
--- a/tests/worker_test.cpp
+++ b/tests/worker_test.cpp
@@ -1,10 +1,10 @@
+#include "utils/worker.h"
+
 #include <gtest/gtest.h>
 #include <hardware/hardware.h>
 
 #include <chrono>
 
-#include "worker.h"
-
 using android::Worker;
 
 struct TestWorker : public Worker {