Logs hearing aid information when a hearing aid is bonded(connected)

The information including device mode, device side, and entry page id where binding process starts. We only log the info once after the hearing aid is bonded. Without forgetting the bluetooth device, it won't log the info again if you disconnect and then reconnect it.

Bug: 237344016
Test: m statsd_testdrive & statsd_testdrive 513
Change-Id: I57a17fd3a6b26855615ab8698c7d3a95e8438603
Merged-In: I57a17fd3a6b26855615ab8698c7d3a95e8438603