btif: hh: Add btif: hh: Add new API to help application send reply for get_report

Linux UHID driver requires an ack when a previous get_report request is
fulfilled. Android relies on the HID (independent from Bluetooth HID)
to deliver the ack, whereas other platforms may not have such an
implementation. This patch adds the API to help other
platforms/applications send the GET_REPORT_REPLY to the driver if
needed.

Bug: 243087440
Test: gd/cert/run
Tag: #floss
Change-Id: Iee28f1e7c57fd6e805cd1a8c181cbc753ba3ce2b