Don't build framework tests for simulator target.

Change-Id: I70f29c7eb307e4f3ec5702f4eb9d97b4342e2f36

libs/utils/tests/Android.mk

@@ -2,6 +2,9 @@
 LOCAL_PATH := $(call my-dir)
 include $(CLEAR_VARS)
 
+ifneq ($(TARGET_SIMULATOR),true)
+
+# Build the unit tests.
 test_src_files := \
 	ObbFile_test.cpp \
 	PollLoop_test.cpp
@@ -37,3 +40,5 @@ $(foreach file,$(test_src_files), \
     $(eval LOCAL_MODULE_TAGS := $(module_tags)) \
     $(eval include $(BUILD_EXECUTABLE)) \
 )
+
+endif