Rename composite constructors to compound constructors.

Change-Id: Ic1f5d28651e8de9d9ecea2a0bcfa73063dd90a9d
Bug: skia:11032
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/393337
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
21 files changed