Require mips to be allocated at texture creation time and disable late allocations.

If we get a non-mipped texture for a draw that wants to be use mip map filter, we
will copy the texture into a new mipped texture.

Clean up of unused code in the GPU backends for reallocating for mips will be done
in a follow up CL.

Bug: skia:
Change-Id: Idab588c1abf4bbbf7eeceb3727d500e5df274188
Reviewed-on: https://skia-review.googlesource.com/132830
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
25 files changed