Workaround for lack of ESSL3 external image extension on older Samsung devices

This undoes the original workaround[1] and moves it to our caps
workarounds. It also forces us to use the ESSL3 extension string when
applying the workaround, as that appears to be necessary. (Otherwise,
offending devices just fail to compile when using the older extension
string with a newer GLSL version).

[1] https://skia-review.googlesource.com/c/skia/+/114505

Bug: skia:7713
Change-Id: I9757034b282a663c6e4d5fd19889c977a12a4d91
Reviewed-on: https://skia-review.googlesource.com/118665
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed