Change value for AF achieved

Change due to to driver change:

https://aiyprojects-review.googlesource.com/c/linux-imx/+/10244

Change-Id: I4f27195a7c1c5f82e24c035c48c877b4088f8051
diff --git a/snapshot b/snapshot
index cc92a5b..cfff51a 100755
--- a/snapshot
+++ b/snapshot
@@ -200,7 +200,7 @@
     try:
       self.sysfs.seek(0)
       v = self.sysfs.read()
-      if int(v) != 1:
+      if int(v) != 0x10:
         print('NO Focus')
     except:
       pass