add graphql files for archiving and deleting in android

android/Omnivore/app/src/main/graphql/ArchiveLinkedItem.graphql

@@ -0,0 +1,12 @@
+mutation SetLinkArchived($input: ArchiveLinkInput!) {
+  setLinkArchived(input: $input) {
+    ... on ArchiveLinkSuccess {
+      linkId
+      message
+    }
+    ... on ArchiveLinkError {
+      message
+      errorCodes
+    }
+  }
+}

android/Omnivore/app/src/main/graphql/DeleteLinkedItem.graphql

@@ -0,0 +1,12 @@
+mutation SetBookmarkArticle($input: SetBookmarkArticleInput!) {
+  setBookmarkArticle(input: $input) {
+    ... on SetBookmarkArticleSuccess {
+      bookmarkedArticle {
+        id
+      }
+    }
+    ... on SetBookmarkArticleError {
+      errorCodes
+    }
+  }
+}

android/Omnivore/app/src/main/java/app/omnivore/omnivore/networking/LinkedItemMutations.kt

@@ -0,0 +1,26 @@
+package app.omnivore.omnivore.networking
+
+import app.omnivore.omnivore.graphql.generated.SetBookmarkArticleMutation
+import app.omnivore.omnivore.graphql.generated.SetLinkArchivedMutation
+import app.omnivore.omnivore.graphql.generated.type.ArchiveLinkInput
+import app.omnivore.omnivore.graphql.generated.type.SetBookmarkArticleInput
+
+suspend fun Networker.deleteLinkedItem(itemID: String): Boolean {
+  val input = SetBookmarkArticleInput(itemID, false)
+  val result = authenticatedApolloClient().mutation(SetBookmarkArticleMutation(input)).execute()
+  return result.data?.setBookmarkArticle?.onSetBookmarkArticleSuccess?.bookmarkedArticle?.id != null
+}
+
+suspend fun Networker.archiveLinkedItem(itemID: String): Boolean {
+  return updateArchiveStatusLinkedItem(itemID, true)
+}
+
+suspend fun Networker.unarchiveLinkedItem(itemID: String): Boolean {
+  return updateArchiveStatusLinkedItem(itemID, false)
+}
+
+private suspend fun Networker.updateArchiveStatusLinkedItem(itemID: String, setAsArchived: Boolean): Boolean {
+  val input = ArchiveLinkInput(setAsArchived, itemID)
+  val result = authenticatedApolloClient().mutation(SetLinkArchivedMutation(input)).execute()
+  return result.data?.setLinkArchived?.onArchiveLinkSuccess?.linkId != null
+}