Those categories are probably for LSAC data collections services more than anything else. Whether an individual school wants to give you an admissions boost b/c you are part of a new LSAC created ethnicity category is up to the individual school. From what I'm seen, Asians get no boost at all in admissions. The exception is when an Asian is applying to a school that very, very few Asians apply to. I'll give you a hint: none of these are top schools or schools located on the coasts.
If you really feel you deserve some sort of special consideration compared to other Asians applying to law school, you can always supplement your application with a "diversity statement" if the school allows it.
An aside: even though you will likely receive no admissions boost for being Asian, you will still be counted as a minority when the school publishes a pie chart or statistics explaining what percentage of minorities attend/were admitted to that school.
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