Remove old TaskManager system

Replace it with a newer, fancier, WorkQueue-inspired
one that's just a global common thread pool.

Test: hwuiunit passes
Change-Id: Ib5d03104a08bbac9a4ec67a1bfc0db2b35d6700f
diff --git a/libs/hwui/renderthread/VulkanManager.cpp b/libs/hwui/renderthread/VulkanManager.cpp
index d4c6eae..e9032af 100644
--- a/libs/hwui/renderthread/VulkanManager.cpp
+++ b/libs/hwui/renderthread/VulkanManager.cpp
@@ -23,6 +23,7 @@
 #include "RenderThread.h"
 #include "renderstate/RenderState.h"
 #include "utils/FatVector.h"
+#include "utils/TraceUtils.h"
 
 #include <GrBackendSemaphore.h>
 #include <GrBackendSurface.h>