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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https://bugs.launchpad.net/bugs/1859846

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

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