Fix bug with unnecessary plugin auto-update attempts

Summary: I've noticed that Flipper is trying to schedule auto-update for some plugins on every startup even though they are already updated. I found this happens because of a race condition when the auto-updater can be triggered before plugins initialised. This diff fixes that.

Reviewed By: passy

Differential Revision: D28312086

fbshipit-source-id: 66b0bd2aa9dfede1737d565b1e7e7845c940405e

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

@@ -768,6 +768,7 @@ test('test determinePluginsToProcess for mutilple clients having plugins present
     marketplacePlugins: [],
     installedPlugins: new Map(),
     uninstalledPlugins: new Set(),
+    initialised: true,
   };
   const op = determinePluginsToProcess(
     [client1, client2, client3],
@@ -842,6 +843,7 @@ test('test determinePluginsToProcess for no selected plugin present in any clien
     marketplacePlugins: [],
     installedPlugins: new Map(),
     uninstalledPlugins: new Set(),
+    initialised: true,
   };
   const op = determinePluginsToProcess([client1, client2], device1, plugins);
   expect(op).toBeDefined();
@@ -893,6 +895,7 @@ test('test determinePluginsToProcess for multiple clients on same device', async
     marketplacePlugins: [],
     installedPlugins: new Map(),
     uninstalledPlugins: new Set(),
+    initialised: true,
   };
   const op = determinePluginsToProcess([client1, client2], device1, plugins);
   expect(op).toBeDefined();
@@ -982,6 +985,7 @@ test('test determinePluginsToProcess for multiple clients on different device',
     marketplacePlugins: [],
     installedPlugins: new Map(),
     uninstalledPlugins: new Set(),
+    initialised: true,
   };
   const op = determinePluginsToProcess(
     [client1Device1, client2Device1, client1Device2, client2Device2],
@@ -1067,6 +1071,7 @@ test('test determinePluginsToProcess to ignore archived clients', async () => {
     marketplacePlugins: [],
     installedPlugins: new Map(),
     uninstalledPlugins: new Set(),
+    initialised: true,
   };
   const op = determinePluginsToProcess(
     [client, archivedClient],