Add lockHardwareWideColorGamutCanvas.

This patch adds a hidden API to return a hardware canvas with wide color gamut
support. The hardware canvas returned from BaseSurfaceHolder.lockHardwareCanvas
doesn't support wide color gamut, this patch makes sure that a wide color gamut
canvas context is created when calling lockHardwareCanvas.

Verified this approach works by building ImageWallpaper to use this API.
Without this API an 8 bit logo P3 doesn't show the logo, with this API the logo
is shown correctly. See b/74116826 for more info.

BUG: 74116826
Test: Build ImageWallpaper using this API with an 8 bit P3 image
Change-Id: Id20343fabcd7f0873d79ce72a235ea9b7c1f3e77