Add extra logging for BLE scans

Add extra logging for BLE scans

Added logging for application name, number of scans, and scan times
for each application that uses gatt scanning.

Example output:
GATT Client Map
  Entries: 1

  Application Name: com.broadcom.app.leexplorer (Registered)
  LE scans (started/stopped)       : 4 / 4
  Scan time in ms (min/max/avg)    : 6 / 7321 / 2744
  Time since last scan ended in ms : 3522
  Last 4 scans in ms (oldest first): 763 6 7321 2887
  Application ID                   : 5
  UUID                             : f69badb3-212b-40b5-b5b3-3bf9214310f9
  Connections: 1
    5: 6B:1F:6C:45:3D:DC

Bug: 26463429
Change-Id: I52376541a5b5874d0e40978990149a1283fd9c6a