Render CJK glyphs at client side [Android/iOS]

[chriswu42]

Summary

Loading CJK glyphs at the client side enables significantly faster map loads than downloading font packages per query. For example, we can reduce the overall map package from 15mb to 1.5mb using this technique - this is something that many developers/customers in Asia are looking to optimize when adding maps on their mobile apps / websites.

@ChrisLoer implemented CJK loading at client side on GL JS using TinySDF and we are looking to add support on native SDKs for Android and iOS.

Technical lifts

1. gl-native “core” support for using TinySDF
2. Android-specific font-loading and configuration
3. iOS-specific font-loading and configuration.

Per voice with @ChrisLoer, he could tackle the first item, but we are looking for support from the Android and iOS teams for items 2 and 3, respectively. @zugaldia @boundsj

@ChrisLoer please add in any technical details I may be missing.

cc @mourner

[zugaldia]

cc: @lilykaiser

[1ec5]

Rendering system or local fonts for all scripts, not just CJK, is also tracked in #7862.

[kkaefer]

First part of this PR is in #10522

[lilykaiser]

Since #10522 has merged, I believe this can be closed. If I'm wrong, please reopen!