Don't limit Windows USB reads.

In a1c60c0597f8f978fd6568c19fb90993592e031d we removed the code that broke
Linux USB reads into 4KiB chunks. This patch does the same for Windows. This
improves Windows "adb pull" speeds 6x in my VM. (There was no equivalent
problem with writes, so this change only affects pull speeds.)

Change-Id: If19013e5f51975f4824bf9147b7b76cebd305b96
1 file changed