Restore adb executeShell [5/n]

Summary: Expose executeShell explicitly through the device interface

Reviewed By: jameslawson

Differential Revision: D31055959

fbshipit-source-id: b14395d0783ede265c6ae39c397ea93a85a78336

desktop/flipper-plugin/src/plugin/PluginBase.tsx

@@ -216,6 +216,9 @@ export abstract class BasePluginInstance {
           realDevice.removeLogListener(handle);
         };
       },
+      executeShell(command: string): Promise<string> {
+        return realDevice.executeShell(command);
+      },
     };
   }