Add --supportQ flag to java StatsLog codegen

Add support to generate Q schema code generation only for modules that
ship to Q.

Bug: 145606209
Test: m
Test: flashes successfully
Test: adb logcat "*:S statsd:*"
Change-Id: I978ac321415f1e8d76e4ec73445894965845aaea
3 files changed
tree: 845f9c6d041a6e9911d4b1c3b365800874818a58
  1. stats/