Improve layer rendering quality

Increase filter quality when rendering a layer into the frame
buffer from kNone_SkFilterQuality to kLow_SkFilterQuality.
This visibly improves the quality if the layer is scaled.
For example the circle shutter button in camera app looks
better in pressed state (there is no jagged edge).

Test: Ran camera app
Bug: 72144993
Change-Id: I138d930a25301a369876d76a2cd322df0324f0f2