[PM-22786] Migrate PersistentListExtensions to core module (#5380)

core/src/main/kotlin/com/bitwarden/core/util/PersistentListExtensions.kt

@@ -0,0 +1,10 @@
+package com.bitwarden.core.util
+
+import kotlinx.collections.immutable.ImmutableList
+import kotlinx.collections.immutable.toImmutableList
+
+/**
+ * Creates an immutable [ImmutableList] of the given [elements] excluding the null ones.
+ */
+fun <T : Any> persistentListOfNotNull(vararg elements: T?): ImmutableList<T> =
+    elements.filterNotNull().toImmutableList()

core/src/test/kotlin/com/bitwarden/core/util/PersistentListExtensionsTest.kt

@@ -0,0 +1,23 @@
+package com.bitwarden.core.util
+
+import kotlinx.collections.immutable.persistentListOf
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Test
+
+class PersistentListExtensionsTest {
+
+    @Test
+    fun `PersistentListOfNotNull should filter out null values`() {
+        val expected = persistentListOf("Hello", "World")
+
+        val result = persistentListOfNotNull(
+            "Hello",
+            null,
+            "World",
+            null,
+            null,
+        )
+
+        assertEquals(expected, result)
+    }
+}