Revert "Revert "ANDROID: usb: dwc3: gadget: don't cancel the started requests""

This reverts commit 17f230fd.

Reason for revert: Still present MTP functional issues when using MAC OS.

We can revert this later if we find and fix any userspace issues that might be causing this.

Bug: 188778499
Change-Id: I9507207b4093d3eba25132657c84ecf7407d6df9
Signed-off-by: Saravana Kannan <saravanak@google.com>
(cherry picked from commit f2d87eb3)