Android's package parser discards an activity, activity-alias or receiver
intent filter that declares no action, so such a filter neither makes the
component exported by default nor triggers the API 31 explicit-export
requirement. Services keep action-less filters. The manifest inventory
counted every declared filter, reporting exported_default true (or an
explicit-export validation error) for components Android does not export.
intent_filter_count still reports every declared filter.
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