drm_hwcomposer: Make uevent listener standalone

1. DRM event listener doesn't work in this conditions, uevent blocks
   the thread and non-blocking select() doesn't make any sense.
   Remove DRM event handling for now.

2. UEvent listeren is common for all DrmDevices, therefore put it into
   ResourceManager class.

Signed-off-by: Roman Stratiienko <roman.o.stratiienko@globallogic.com>
diff --git a/bufferinfo/legacy/BufferInfoImagination.cpp b/bufferinfo/legacy/BufferInfoImagination.cpp
index d646072..691dd14 100644
--- a/bufferinfo/legacy/BufferInfoImagination.cpp
+++ b/bufferinfo/legacy/BufferInfoImagination.cpp
@@ -20,6 +20,8 @@
 
 #include <xf86drm.h>
 
+#include <cerrno>
+
 #include "img_gralloc1_public.h"
 #include "utils/log.h"