Update LazyProxy creation to allow for a non-textureable result

Change-Id: Ic284b4f4220afa714159e07f57798a94fd40d63a
Reviewed-on: https://skia-review.googlesource.com/102484
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
16 files changed