Force the SkVM interpreter if trace opcodes are encountered.
Force the SkVM interpreter if trace opcodes are encountered.

Trace opcodes will only be implemented in the interpreter. If we
encounter one while JITting a program, returning false will cause
execution to fall back to the interpreter automatically.

Change-Id: I94fce376cb7336c16072a174604de025f1b4e38a
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/473137
Auto-Submit: John Stiles <f4fcf42d3bb5924557f1eeb3be66747535e585da@google.com>
Commit-Queue: Herb Derby <9e12a3d2bbf73546e47cc9958f6ba8f3215b7eaf@google.com>
Reviewed-by: Herb Derby <9e12a3d2bbf73546e47cc9958f6ba8f3215b7eaf@google.com>

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