Add a CSV parser to parse the output from kati.

(Yet another class that would be great for android to have in a host
tools library)

Test: m product-config-test && java -jar out/host/linux-x86/testcases/product-config-test/product-config-test.jar
Change-Id: I7d74b2265393e4f340729ca5ba82d1ec92a20f85