ExifInterface: fix class load failure

libexif_jni was renamed as libjhead_jni

b/12203995
Change-Id: I0ceff1ad288c7ce2255826d5d5ba9ca1f121a556
reduce cookie tracking (3/4): add a way to count cookies

Change-Id: Ibc1c8d3160a89de51531a89c5103b47ba2c2c649