vold2: Don't build for simulator

Signed-off-by: San Mehat <san@google.com>
diff --git a/Android.mk b/Android.mk
index aaccdbf..564338e 100644
--- a/Android.mk
+++ b/Android.mk
@@ -1,4 +1,8 @@
-BUILD_VOLD2 := true
+BUILD_VOLD2 := false
+ifneq ($(TARGET_SIMULATOR),true)
+    BUILD_VOLD2 := true
+endif
+
 ifeq ($(BUILD_VOLD2),true)
 
 LOCAL_PATH:= $(call my-dir)