Remove superfluous budgeted params and member related to SkImage_GpuBase

The proxy/proxies in the SkImage_GpuBase subclasses already track
whether they're budgeted.

The parameters are sometimes redundantly stating the known budgeted
status of the proxy. Other times they are an illusion of control as
the value doesn't actually affected the budgeting of the proxy/proxies.

Change-Id: Ic2b12fbbed653fca1ec1910eeab686de69782834
Reviewed-on: https://skia-review.googlesource.com/c/179402
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
11 files changed