Fix build breakage. Changed api file to avoid collision with platform.

Change-Id: I1228b62cddc723f79267adec414561aa35787ded
diff --git a/Android.mk b/Android.mk
index 0812eae..c304ebe 100644
--- a/Android.mk
+++ b/Android.mk
@@ -16,7 +16,7 @@
 
 LOCAL_PATH:= $(call my-dir)
 
-uiautomator_internal_api_file := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/uiautomator_api.txt
+uiautomator_internal_api_file := $(TARGET_OUT_COMMON_INTERMEDIATES)/PACKAGING/ub_uiautomator_api.txt
 
 ###############################################
 # Build core library