Metrics: Log remote device information to statsd

* Log device information through +XAPL HFP VSC
* Log deivce information through Bluetooth metadata APIs
* Do not respond to +XAPL VSC if the device info segment is badly
  formatted

Bug: 112969790
Test: make, test drive with statsd
Change-Id: Id3dd3009042f833254dde17dd3030e8527846df3