It doesn't really serve a purpose and is not automatically triggered.
Apps need to trigger it manually through
AnalyticsCollector.notifyNetworkTypeChanged which is easy to forget.
Moreover, the current network type can be obtained by Util.getNetworkType
at any time when it's needed without the need for a listener.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=199790033
