Add client-side shareWithEmail

Define the contract for sharing lists. To share, simply post an instance of ListShare.

Listify/app/src/main/java/com/example/listify/data/ListShare.java

@@ -0,0 +1,27 @@
+package com.example.listify.data;
+
+public class ListShare {
+    Integer listID;
+    String shareWithEmail;
+
+    public ListShare(Integer listID, String shareWithEmail) {
+        this.listID = listID;
+        this.shareWithEmail = shareWithEmail;
+    }
+
+    public Integer getListID() {
+        return listID;
+    }
+
+    public void setListID(Integer listID) {
+        this.listID = listID;
+    }
+
+    public String getShareWithEmail() {
+        return shareWithEmail;
+    }
+
+    public void setShareWithEmail(String shareWithEmail) {
+        this.shareWithEmail = shareWithEmail;
+    }
+}