Bluetooth: Add support for resolving BR/EDR names

If BR/EDR device didn't provide name in EIR (or no EIR at all) names
are resolved after discovery is completed. Resolved names are put into
EIR block.

> HCI Event: Extended Inquiry Result (0x2f) plen 255
        Num responses: 1
        Address: F0:79:59:03:6B:30 (ASUSTek COMPUTER INC.)
        Page scan repetition mode: R1 (0x01)
        Page period mode: P0 (0x00)
        Class: 0x280424
          Major class: Audio/Video (headset, speaker, stereo, video, vcr)
          Minor class: Set-top box
          Capturing (Scanner, Microphone)
          Audio (Speaker, Microphone, Headset)
        Clock offset: 0x47d5
        RSSI: -88 dBm (0xa8)
> HCI Event: Inquiry Complete (0x01) plen 1
        Status: Success (0x00)
< HCI Command: Remote Name Request (0x01|0x0019) plen 10
        Address: F0:79:59:03:6B:30 (ASUSTek COMPUTER INC.)
        Page scan repetition mode: R1 (0x01)
        Page scan mode: Mandatory (0x00)
        Clock offset: 0x47d5
> HCI Event: Command Status (0x0f) plen 4
      Remote Name Request (0x01|0x0019) ncmd 1
        Status: Success (0x00)
> HCI Event: Remote Name Req Complete (0x07) plen 255
        Status: Success (0x00)
        Address: F0:79:59:03:6B:30 (ASUSTek COMPUTER INC.)
        Name: Nexus Player

Change-Id: Ica5f6cc8a7d9dc7a925025bc62faab2caec47dbb
Signed-off-by: Szymon Janc <ext.szymon.janc@tieto.com>