usb: set sys.usb.mtp.batchcancel to true

The cancelling behavior in MTP has two behaviors.
1. cancel requests one by one
2. batch cancel all requests

This patch will set the property to true to enable
batch cancel all requests.

Bug: 181729410
Test: build pass
Change-Id: Iad744e27e6f843ae22fc499efbb803be51e1b820
1 file changed