Send DeviceResetCmd after task handle is dropped.

Previously the command was sent before the task handle is dropped. This
may cause race condition that the DeviceResetRsp may be consumed by the
reader created in open(). In this case, the
consume_device_reset_rsp_and_ntf will wait until timeout.

Bug: 316421259
Test: manual
Change-Id: I680d3ea79344f9b5f07a36877837bfc1b8e0532a