Update height of predictionRow + 4dp to be aligned with NL app suggestions height.

spec: https://screenshot.googleplex.com/9VsQXxmsuZvoj7Y
Add 4dp to the existing height when using two lines. Need to do this for prediction row as well so that
animation is smooth and doesn't show jumpiness.

bug: 378472318
Test: photos:
before: https://screenshot.googleplex.com/7F8FNdnrngpuSUe
after: https://screenshot.googleplex.com/63vttsfptSqwE7c
Flag: NONE increasing height
Change-Id: I2076160efe3596cc8673d32b5066ec2103f71eb0