Use ApplyPadding when calculating count_v, same way as for sum_v and sum_vv.
Use ApplyPadding when calculating count_v, same way as for sum_v and sum_vv.

Also change how the multiplier is applied, removing an extra MUL op.

PiperOrigin-RevId: 404641605

tensorflow/lingvo,tensorflow/lingvo,tensorflow/lingvo,tensorflow/lingvo