Switch Bazel builds to use SkRP by default.

This CL gives our Bazel builds the same default settings as our
GN builds (as of http://review.skia.org/676617). This change led to
some minor IWYU ripples as well.

Change-Id: I4503ca9a6381ad3817d19b10baadf9645e3faaef
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/682976
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
Reviewed-by: Chris Mumford <cmumford@google.com>
7 files changed