Update the SnackbarRelayManager (#5317)

core/src/main/kotlin/com/bitwarden/core/data/repository/util/SharedFlowExtensions.kt

@@ -1,6 +1,7 @@
 package com.bitwarden.core.data.repository.util
 
 import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.first
 
 /**
  * Creates a [MutableSharedFlow] with a buffer of [Int.MAX_VALUE] and the given [replay] count.
@@ -12,3 +13,17 @@ fun <T> bufferedMutableSharedFlow(
         replay = replay,
         extraBufferCapacity = Int.MAX_VALUE,
     )
+
+/**
+ * Emits a [value] to this shared flow, suspending until there is at least one subscriber.
+ */
+suspend fun <T> MutableSharedFlow<T>.emitWhenSubscribedTo(value: T) {
+    // We have subscribers, so emit now.
+    if (subscriptionCount.value > 0) {
+        emit(value = value)
+        return
+    }
+    // We are going to wait until there is at least one subscriber, then emit.
+    subscriptionCount.first { it > 0 }
+    emit(value = value)
+}