adding UI

Summary:
- Adds the Flipper notifications UI from the hackweek
- The notifications plugin is hidden behind a GK `flipper_notifications`
- Plugins currently can not dispatch any notifications

Reviewed By: jknoxville, passy

Differential Revision: D10300838

fbshipit-source-id: 2a3a823f09fee3370ce725b506b162e57751c382

src/plugin.js

@@ -24,23 +24,12 @@ export type PluginClient = {|
 
 type PluginTarget = BaseDevice | Client;
 
-export type Notification = {|
-  title: string,
-  message: string,
-  severity: 'warning' | 'error',
-  timestamp?: number,
-  category?: string,
-  action?: string,
-|};
-
-export type NotificationSet = {[id: string]: Notification};
-
 export type Props<T> = {
   logger: Logger,
   persistedState: T,
   setPersistedState: (state: $Shape<T>) => void,
-  setActiveNotifications: NotificationSet => void,
   target: PluginTarget,
+  deepLinkPayload: ?string,
 };
 
 export class FlipperBasePlugin<
@@ -75,9 +64,6 @@ export class FlipperBasePlugin<
   // methods to be overriden by plugins
   init(): void {}
   teardown(): void {}
-  computeNotifications(props: Props<*>, state: State): NotificationSet {
-    return {};
-  }
   // methods to be overridden by subclasses
   _init(): void {}
   _teardown(): void {}
@@ -97,10 +83,6 @@ export class FlipperBasePlugin<
       throw new TypeError(`Reducer ${actionData.type} isn't a function`);
     }
   }
-
-  componentDidUpdate(props: Props<*>, state: State): void {
-    props.setActiveNotifications(this.computeNotifications(props, state));
-  }
 }
 
 export class FlipperDevicePlugin<S = *, A = *, P = *> extends FlipperBasePlugin<