(Mostly) respect FilterQuality in draw[stretchy]

Bug: b/77917978

For
  drawImageLattice
  drawBitmapLattice
  drawImageNine
  drawBitmapNine
, respect the SkFilterQuality on the SkPaint. Previously the GPU used
the lowest quality to avoid a bleeding effect, leading to ugly nine-
patches on Android.

For all backends, cap the filter quality at kLow_SkFilterQuality.
Update SkCanvas' documentation to specify this.

Change-Id: Id28c7753834975f039170f14bc51be4f2bd44d41
Reviewed-on: https://skia-review.googlesource.com/121891
Reviewed-by: Cary Clark <caryclark@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
Auto-Submit: Leon Scroggins <scroggo@google.com>
3 files changed