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/Android.bp b/Android.bp
index ddf66fb..eba92f8 100644
--- a/Android.bp
+++ b/Android.bp
@@ -95,12 +95,12 @@
         "drm/DrmCrtc.cpp",
         "drm/DrmDevice.cpp",
         "drm/DrmEncoder.cpp",
-        "drm/DrmEventListener.cpp",
         "drm/DrmFbImporter.cpp",
         "drm/DrmMode.cpp",
         "drm/DrmPlane.cpp",
         "drm/DrmProperty.cpp",
         "drm/ResourceManager.cpp",
+        "drm/UEventListener.cpp",
         "drm/VSyncWorker.cpp",
 
         "utils/autolock.cpp",