Log all Usb accessories

Logs when connecting/disconnect thumbdrive.

01-14 19:58:45.370   918  1009 I statsd  : { uid(1000) 1547524725000000000 338323224430 (77)0x10000->1921[I] 0x20000->21889[I] 0x30000->0[I] 0x40000->0[I] 0x50000->1[I] 0x60000->0[I] 0x70000->10724[L]  }
01-14 20:00:27.471   918  1009 I statsd  : { uid(1000) 1547524827000000000 440424268612 (77)0x10000->1921[I] 0x20000->21889[I] 0x30000->0[I] 0x40000->0[I] 0x50000->1[I] 0x60000->1[I] 0x70000->0[L]  }
01-14 20:00:36.198   918  1009 I statsd  : { uid(1000) 1547524836000000000 449151666148 (77)0x10000->1921[I] 0x20000->21889[I] 0x30000->0[I] 0x40000->0[I] 0x50000->1[I] 0x60000->0[I] 0x70000->8727[L]  }
01-14 20:00:39.401   918  1009 I statsd  : { uid(1000) 1547524839000000000 452354416467 (77)0x10000->1921[I] 0x20000->21889[I] 0x30000->0[I] 0x40000->0[I] 0x50000->1[I] 0x60000->1[I] 0x70000->0[L]  }
01-14 20:00:48.348   918  1009 I statsd  : { uid(1000) 1547524848000000000 461301290587 (77)0x10000->1921[I] 0x20000->21889[I] 0x30000->0[I] 0x40000->0[I] 0x50000->1[I] 0x60000->0[I] 0x70000->8947[L]  }

Bug: 120566491
Test: Manually tested by running: adb shell cmd stats print-logs,
    adb logcat | grep statsd | grep \(77\)
Change-Id: I172964ad592b910fcadf88c84f9cbd9d47f44131