Pass the supportQ flag to stats-log-api-gen

Statsd is becoming a Mainline module in R. As part of that effort,
the logging schema has been updated. However, mainline modules
using statsd that are updated in Q still need to use the legacy schema.
So we've added support for that in the autogeneration tool by passing a
flag to support legacy logging schema.

Note: this change is not needed if this module will not be updated in Q.

Bug: 145624233
Test: m
Test: flashes successfully
Change-Id: Ib855001f791c28ec5166bb4400119bd04783dbb1
diff --git a/Android.bp b/Android.bp
index 0695b55..b6857ff 100644
--- a/Android.bp
+++ b/Android.bp
@@ -223,7 +223,8 @@
     name: "statslog-networkstack-java-gen",
     tools: ["stats-log-api-gen"],
     cmd: "$(location stats-log-api-gen) --java $(out) --module network_stack" +
-         " --javaPackage com.android.networkstack.metrics --javaClass NetworkStackStatsLog",
+         " --javaPackage com.android.networkstack.metrics --javaClass NetworkStackStatsLog" +
+         " --supportQ",
     out: ["com/android/networkstack/metrics/NetworkStackStatsLog.java"],
 }