Cherry pick #6828 (Line-break ideographic text by character)

[tobrun]

Capturing from @1ec5 that Android will need a port of #6828. That PR allows to:

Automatically insert a line break after any supported Chinese, Japanese, or Yi character in a point-placed label as needed to stay within the text-max-width. Balance the lines unless non-ideographic text such as Latin letters are present.

Possibly also a port of mapbox/mapbox-gl-js#3438 is also needed.

Update: confusion from my end, we just need to cherry pick #6828 into the release-v4.2.0 branch. Using this ticket to track it.

[1ec5]

A port of mapbox/mapbox-gl-js#3438 is tracked in #1682. Neither #6828 nor #1682 requires any SDK work, other than to chery-pick the changes into the release branches.

[tobrun]

Commits were cherrypicked into release brach here, closing.

[1ec5]

@tobrun, #6828 has not yet landed in master. I suggest backing out the cherry-picked commits and waiting until my PR passes a code review, because it'll get rebased before merging to master.

[1ec5]

Looks like these commits got rewritten out of the branch already. 👍 Closing.

[1ec5]

And reopening to track the eventual cherry-picking.

[jfirebaugh]

Per chat, this feature is not required for the 4.2.0 release. Closing.