Log ENR appear animation events

The linked bug might be caused by concurrent appear animations started
for the same row, and one of them not being finalized. Log the start,
finish, cancel and skip events for the appear animations of the row,
to help investigate.

Bug: 356958336
Test: enable the NotifLog buffer, and check the logs
Flag: EXEMPT changing dumps only
Change-Id: I29a29e18776ca6da7dbd9654dde5334daa788403