Change skia::tracing_internals to skia_internal

Many of our clients, PDFium, Chromium, Android, etc. use the namespace skia. We are switching
to skia_internal to avoid name lookup problems.

Change-Id: Id801ab7301d379169b7a095422c5f5da603f9104
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/626198
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
4 files changed