Plugin Marketplace state refresh and cache

Summary:
Separate dispatcher for periodic refreshing available plugins data from the Marketplace backend and caching it locally.

The plugin auto update downloader subscribes to these state refreshes and automatically schedules plugin update downloads when required.

Reviewed By: passy

Differential Revision: D25360897

fbshipit-source-id: 5b6d95b63ff47b8ae9ad8b12e2480d1fed524ca5

desktop/app/src/utils/__tests__/exportData.node.tsx

@@ -766,6 +766,7 @@ test('test determinePluginsToProcess for mutilple clients having plugins present
     disabledPlugins: [],
     failedPlugins: [],
     selectedPlugins: ['TestPlugin'],
+    marketplacePlugins: [],
   };
   const op = determinePluginsToProcess(
     [client1, client2, client3],
@@ -831,6 +832,7 @@ test('test determinePluginsToProcess for no selected plugin present in any clien
     disabledPlugins: [],
     failedPlugins: [],
     selectedPlugins: ['RandomPlugin'],
+    marketplacePlugins: [],
   };
   const op = determinePluginsToProcess([client1, client2], device1, plugins);
   expect(op).toBeDefined();
@@ -874,6 +876,7 @@ test('test determinePluginsToProcess for multiple clients on same device', async
     disabledPlugins: [],
     failedPlugins: [],
     selectedPlugins: ['TestPlugin'],
+    marketplacePlugins: [],
   };
   const op = determinePluginsToProcess([client1, client2], device1, plugins);
   expect(op).toBeDefined();
@@ -955,6 +958,7 @@ test('test determinePluginsToProcess for multiple clients on different device',
     disabledPlugins: [],
     failedPlugins: [],
     selectedPlugins: ['TestPlugin'],
+    marketplacePlugins: [],
   };
   const op = determinePluginsToProcess(
     [client1Device1, client2Device1, client1Device2, client2Device2],
@@ -1033,6 +1037,7 @@ test('test determinePluginsToProcess to ignore archived clients', async () => {
     disabledPlugins: [],
     failedPlugins: [],
     selectedPlugins: ['TestPlugin'],
+    marketplacePlugins: [],
   };
   const op = determinePluginsToProcess(
     [client, archivedClient],