De-proc Color32
Also strips SK_SUPPORT_LEGACY_COLOR32_MATH,
which is no longer needed.
Seems handy to have SkTypes include the relevant intrinsics when
we know we've got them, but I'm not married to it.
Locally this looks like a pointlessly small perf win, but I'm mostly
keen to get all the code together.
BUG=skia:
Committed: https://skia.googlesource.com/skia/+/
376e9bc206b69d9190f38dfebb132a8769bbd72b
Committed: https://skia.googlesource.com/skia/+/
d65dc0cedd5b50dd407b6ff8fdc39123f11511cc
CQ_EXTRA_TRYBOTS=client.skia.compile:Build-Ubuntu-GCC-Mips-Debug-Android-Trybot
Review URL: https://codereview.chromium.org/
1104183004