Use -q to silence zip comments, which also silences the first line.
Bug: 67345114
Test: find vendor -name '*.apk' | xargs build/tools/dump-package-stats
Change-Id: Icb319c603de7c29644c58520213940179f67b7e4
Unzip 6.0 changes the name of the fourth column in the "unzip -lv"
output from "Ratio" to "Cmpr". Allow either name so that
dump-package-stats works with both unzip 5 and unzip 6.