My Problem was just a naming issue :-

$ dmesg | grep -i 'bluetooth'

if you are facing some naming problem,the output of above command should
be somthing like this ->

Bluetooth hci0: Direct firmware load for brcm/BCM43142A0-0489-e062.hcd failed 
with error -2
Bluetooth: hci0: BCM: Patch brcm/BCM43142A0-0489-e062.hcd not found

The Problem here is in this folder : /lib/firmware/brcm

$ ls /lib/firmware/brcm/*.hcd

The above command gives output of some *.hcd file (in my case BCM.hcd).
But my kernal is looking for BCM43142A0-0489-e062.hcd. 
All you need to do is make a copy and rename.

$ cp /lib/firmware/brcm/BCM.hcd
/lib/firmware/brcm/BCM43142A0-0489-e062.hcd (in my case)

Restart the PC and will see the frimware is loaded.

BAM!!
Now you can see bluetooh is working.
Done.

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You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux-firmware in Ubuntu.
https://bugs.launchpad.net/bugs/1859846

Title:
  Ubuntu  doesn't have driver for Broadcom BCM43142 Bluetooth Adapter

Status in linux-firmware package in Ubuntu:
  Expired

Bug description:
  Hello!

  I have laptop Sony VAIO SVF15A1S9R with Ubuntu 19.10. Unfortunately my 
bluetooth doesn't work.
  I digged some info and found that driver for my Broadcom BCM43142 Bluetooth 
Adapter does't exist in /lib/firmware/brcm. Please fix it. See my output:

  find /lib/firmware/brcm -name '*4314*'
  /lib/firmware/brcm/brcmfmac43143.bin
  /lib/firmware/brcm/brcmfmac43143-sdio.bin

  
  sudo dmesg | grep Blue
  [sudo] пароль для igor: 
  [10620.218329] Bluetooth: Core ver 2.22
  [10620.218404] Bluetooth: HCI device and connection manager initialized
  [10620.218409] Bluetooth: HCI socket layer initialized
  [10620.218412] Bluetooth: L2CAP socket layer initialized
  [10620.218418] Bluetooth: SCO socket layer initialized
  [10620.415125] Bluetooth: hci0: BCM: chip id 70
  [10620.416119] Bluetooth: hci0: BCM: features 0x06
  [10620.432132] Bluetooth: hci0: BCM43142A
  [10620.436127] Bluetooth: hci0: BCM43142A0 (001.001.011) build 0000
  [10620.541419] Bluetooth: hci0: BCM: Patch brcm/BCM43142A0-0489-e062.hcd not 
found
  [10620.819868] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
  [10620.819871] Bluetooth: BNEP filters: protocol multicast
  [10620.819877] Bluetooth: BNEP socket layer initialized
  [10622.564506] Bluetooth: hci0: command 0x1003 tx timeout
  [10622.566202] Bluetooth: hci0: unexpected event for opcode 0x1003
  [10622.696656] Bluetooth: RFCOMM TTY layer initialized
  [10622.696664] Bluetooth: RFCOMM socket layer initialized
  [10622.696673] Bluetooth: RFCOMM ver 1.11

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