Set --internalSamples for nanobench

Use 4 internal msaa samples on mobile and AppleM1, otherwise 8.

Bug: skia:12372
Change-Id: Ic64d93d65d9fef89df08f7471f9552b4a2546316
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/441682
Commit-Queue: Chris Dalton <csmartdalton@google.com>
Reviewed-by: Greg Daniel <egdaniel@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
2 files changed