Handle failed usb/reads and writes correctly

Currently if the device is unplugged from host,
there is a lot of log spamming since fastbootd
does not not recognize that the device has been
disconnected and keeps trying to read/write to the
device.

2856 printk messages dropped ** [  169.941904] c7    579 fastbootd: aio: got error event on
read total bufs 1: No such devie
** 2960 printk messages dropped ** [  169.953328] c7    579 fastbootd: Fastboot command:
** 2074 printk messages dropped ** [  169.961355] c7    579 fastbootd: aio: got error event
on read total bufs 1: No such devie

Bug: 121333158
Test: unplug device and check for log spam multiple times

Change-Id: I1d4c6f48f34e313c5ebce23d62a4fe6a6373f94f