Remove duplicate res dir.

Change-Id: Ie5a9daa3740af630972028eadc4911d72482b9df

sample/Android.mk

diff --git a/sample/Android.mk b/sample/Android.mk
index 8d3f786..43c22e7 100644
--- a/sample/Android.mk
+++ b/sample/Android.mk
@@ -28,7 +28,7 @@
      $(call all-java-files-under, src) \
      $(call all-logtags-files-under, src)
 
-LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/, $(res_dirs)) $(LOCAL_PATH)/res
+LOCAL_RESOURCE_DIR := $(addprefix $(LOCAL_PATH)/, $(res_dirs))
 LOCAL_AAPT_FLAGS := --auto-add-overlay
 LOCAL_AAPT_FLAGS += --extra-packages com.android.bitmap