Calling libusb_reset_device() resets the usb connection with device
on linux platform. It can interfere with other usb interfaces and only
works on linux.
Removing it only affects when adb server is killed while doing IO with
device, which will be solved in later patches.
Bug: http://b/32952319
Test: none
Change-Id: I19522435eadd938ff95d49cbae3bcaa5c8f6d184
Add a libusb-based implementation alongside the existing native
implementations, controlled by the ADB_LIBUSB environment variable.
Windows will need more work for the usb driver.
Bug: http://b/31321337
Test: python test_device.py on linux/darwin, with ADB_LIBUSB=0 and 1
Change-Id: Ib68fb2c6c05475eae3ff4cc19f55802a6f489bb7