Revert "[svg] Relocate out of experimental"

This reverts commit 6fc4106a9d641933abccc6703516206c8ae6d7eb.

Reason for revert: Blocking the Android roll

Original change's description:
> [svg] Relocate out of experimental
>
> Move the SVG rendering code to modules/svg, and componentize.
> Also split into include/src/utils.
>
> As external clients still reference the old header locations,
> introduce temporary forwarding headers to facilitate the migration.
>
> Change-Id: Ib289dbdcd80c16a01c47805e7242f2e08bebc165
> Reviewed-on: https://skia-review.googlesource.com/c/skia/+/326948
> Reviewed-by: Tyler Denniston <tdenniston@google.com>
> Commit-Queue: Florin Malita <fmalita@google.com>

TBR=fmalita@chromium.org,fmalita@google.com,tdenniston@google.com

Change-Id: I386cf77a15a9e1d392029804abaf937dae53f435
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/327342
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>
diff --git a/samplecode/SampleSVGFile.cpp b/samplecode/SampleSVGFile.cpp
index c295e3a..6069fae 100644
--- a/samplecode/SampleSVGFile.cpp
+++ b/samplecode/SampleSVGFile.cpp
@@ -9,9 +9,9 @@
 
 #ifdef SK_XML
 
+#include "experimental/svg/model/SkSVGDOM.h"
 #include "include/core/SkCanvas.h"
 #include "include/core/SkStream.h"
-#include "modules/svg/include/SkSVGDOM.h"
 #include "samplecode/Sample.h"
 #include "src/core/SkOSFile.h"
 #include "src/utils/SkOSPath.h"