Don't treat prefetched cards as visible.

Previously, prefetched cards were considered visible,
which is inefficient when the number of cards to prefetch is
large, and can confuse the hit detection logic (see b3468797)

Change-Id: I91e150c52b88608eb8627edc8cce30ecfb44e672
1 file changed
tree: d23ad5bfde9a04700c6e301cf0e2820bad564146
  1. carousel/
  2. common/
  3. CleanSpec.mk