Refractor entire code to use databinding

[AkshayCHD]

With the databinding library of android the boilerplate code could be reduced alot.

• [x] Add databinding to activities
• [ ] Add databinding to adapters
• [ ] Add databinding to fragments

Would you like to work on issue Yes

[AkshayCHD]

@championswimmer please have a look.

[AkshayCHD]

@the-dagger is there no bounty for the issues created ourself.??

[championswimmer]

Sound good!