Use triple slash in localUri of local assets

[tsapeta]

Why

Fixes https://linear.app/expo/issue/ENG-724/textures-not-loading-in-expo-gl-in-published-android-apps
Fixes #10906
Related #12101

How

Local assets returned by expo-updates have just one slash in their file URIs. expo-gl requires at least two, see below 👇

expo/packages/expo-gl-cpp/cpp/EXGLImageUtils.cpp

Line 126 in 9c26fbc

if (strncmp(localUri.c_str(), "file://", 7) != 0) {

expo-updates used file.toURI() which returns java.net.URI object that stringifies to file:/... URI, which is actually not correct on many platforms. Instead, we need to use Uri.fromFile(file) from android.net.Uri that returns file:///... URI.

Test Plan

Creating GL texture from the asset works and it renders correctly (tried some GL examples in published NCL). Also tested against some other examples using assets.

Checklist

• Documentation is up to date to reflect these changes (eg: https://docs.expo.io and README.md).
• This diff will work correctly for expo build (eg: updated @expo/xdl).
• This diff will work correctly for expo prebuild & EAS Build (eg: updated a module plugin).

[brentvatne]

do we need to do anything to backport this to sdk 41? we should ship this to the sdk 41 beta today or tomorrow so people can kick the tires

[tsapeta]

Nope, this part of expo-updates is not being versioned so it's gonna work on all supported SDKs. Am I right @esamelson?

[esamelson]

yes, you are right @tsapeta -- this will work out of the box with all sdk versions!