HID: Free timer after removing device

Timer conn.process_repage_timer is being freed in HID_HostDeregister
which causes use after free condition in HID_HostRemoveDev->
HID_HostCloseDev.

Fix:
Call alarm_free after HID_HostRemoveDev in HID_HostDeregister

Test:
Code analysis

Bug: 116774368
Change-Id: Iddecd126716a5660f4c37ddc917bacee84342297