Add microbenchmark for LineHeightStyle.Mode.PerLine

TAG=agy
CONV=6a150c76-4f35-43bb-8f3d-bb17402fa8e9

Bug: 520107988
Test: ./gradlew :compose:ui:ui-text:benchmark:connectedAndroidTest
Relnote: "N/A"
Change-Id: I7cee2042c915079c4d8354c7ae878afde325c0c0