Summary:
Flipper tracks devices on an adb connection. If the adb server gets killed, it deletes all devices, but doesn't attempt to reconnect.
This gets it to rety after 500ms.
Reviewed By: priteshrnandgaonkar
Differential Revision: D10526974
fbshipit-source-id: a2101067f2245b728f458fc5e06dc68833c5e772