Add methods to RestApiService interface

Change-Id: I7d914359857759a11a128b20f8770afd1cd33d86
diff --git a/polygerrit-ui/app/constants/constants.ts b/polygerrit-ui/app/constants/constants.ts
index 32e1bed..00acc05 100644
--- a/polygerrit-ui/app/constants/constants.ts
+++ b/polygerrit-ui/app/constants/constants.ts
@@ -146,3 +146,12 @@
   FIRST_NAME = 'FIRST_NAME',
   FULL_NAME = 'FULL_NAME',
 }
+
+/**
+ * @desc The state of the projects
+ */
+export enum ProjectState {
+  ACTIVE = 'ACTIVE',
+  READ_ONLY = 'READ_ONLY',
+  HIDDEN = 'HIDDEN',
+}