HID: Fix to handle UHID_OUTPUT_EV command from UHID driver

Incorrect size check for UHID_OUTPUT_EV for incoming data from
UHID driver of kernel was leading to exiting of poll thread.
This was causing IOT issues with Apple Magic Mouse that require
output report to be sent for proper functioning of scroll functionality.

Bug: 28942565
Change-Id: I2eaba1f70b7cd51fb21933031d439543eb141fd2