Rename isDown to is_down in SlowInputEventReported

The naming convention is word1_word2, not word1Word2 for the atom
fields. We haven't logged this atom yet, so lets rename it before it's
too late.

Bug: 169866723
Test: build only
Change-Id: I575bcc4bed0b55ff98d9b2cea20cb5728e98d065
1 file changed
tree: aa3174c87c149a97984de3d990cc5a92c6483fcc
  1. stats/
  2. OWNERS