fix: allow using existing session token(String) in place autocomplete (#722)

* fix: add session token constructor to place autocomplete

* Update comment

Author: SethMyers

src/main/java/com/google/maps/PlaceAutocompleteRequest.java

@@ -67,6 +67,15 @@ public SessionToken(UUID uuid) {
       this.uuid = uuid;
     }
 
+    /**
+     * Construct a session that is a continuation of a previous session.
+     *
+     * @param token The unique String to be used as the seed for the session identifier.
+     */
+    public SessionToken(String token) {
+      this.uuid = UUID.nameUUIDFromBytes(token.getBytes());
+    }
+
     /**
      * Retrieve the universally unique identifier for this session. This enables you to recreate the
      * session token in a later context.