tflite: Add cros-mtk-pre-compile custom op support

We will use this custom op to run the pre-compile node in the tflite.

BUG=b:372342175
TEST=Run the mixed model

Change-Id: I9abec6dacb28fa938602badab31d52440b983955
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/tflite/+/5802655
Reviewed-by: Pochun Lin <pochun.lin@mediatek.corp-partner.google.com>
Reviewed-by: Shik Chen <shik@chromium.org>
Commit-Queue: Yi Chou <yich@google.com>
Tested-by: Yi Chou <yich@google.com>