Add support for SSA (v4+) MarginL, MarginR, MarginV style#10169

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szaboa wants to merge 6 commits intogoogle:dev-v2from

szaboa:dev-v2-8435-ssa-margin

Commits on Apr 9, 2022

Commits on Apr 16, 2022

Correct SSA/ASS margin style behavior when the alignment is middle/top
szaboa
committed

Commits on Apr 17, 2022