Revert "Revert "Add Atlas Text interface for rendering SDF glyphs.""

This reverts commit 9c2202ffc22b4293b48a4edeafa1b5d2bab8bb83.

Bug: skia:
Change-Id: I482ddf74f8e40d3d0908c840ba5c6ff981ccefbd
Reviewed-on: https://skia-review.googlesource.com/73345
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/public.bzl b/public.bzl
index f455981..dfc163b 100644
--- a/public.bzl
+++ b/public.bzl
@@ -255,6 +255,9 @@
 
         # Only used to regenerate the lexer
         "src/sksl/lex/*",
+
+        # Atlas text
+        "src/atlastext/*",
     ],
 )