Bug 1816433 - Reduce maybeFetchExperiments interval when using the preview collection

app/src/main/java/org/mozilla/fenix/experiments/NimbusSetup.kt

@@ -102,8 +102,13 @@ fun NimbusInterface.maybeFetchExperiments(
     feature: NimbusSystem = FxNimbus.features.nimbusSystem.value(),
     currentTimeMillis: Long = System.currentTimeMillis(),
 ) {
+    val minimumPeriodMinutes = if (!context.settings().nimbusUsePreview) {
+        feature.refreshIntervalForeground
+    } else {
+        0
+    }
+
     val lastFetchTimeMillis = context.settings().nimbusLastFetchTime
-    val minimumPeriodMinutes = feature.refreshIntervalForeground
     val minimumPeriodMillis = minimumPeriodMinutes * Settings.ONE_MINUTE_MS
 
     if (currentTimeMillis - lastFetchTimeMillis >= minimumPeriodMillis) {