Use ConstraintLayout for ez size ratio calculation and merge cover-only view
holder with compact's
(cherry picked from commit fad1449de34952e12e2c5464dccf500d49fa7fa1)
# Conflicts:
# app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/browse/SourceItem.kt
# app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryComfortableGridHolder.kt
# app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCompactGridHolder.kt
# app/src/main/res/layout/source_comfortable_grid_item.xml
# app/src/main/res/layout/source_compact_grid_item.xml
c293fd61b1