Add adaptive launcher icon

[abhijitparida]

Source material:

1. https://github.com/abhijitparida/bunk/blob/master/promo/logo.svg
2. https://github.com/abhijitparida/bunk/blob/master/promo/playstore%20logo.png

[jashasweejena]

I would like to work on this :)

[abhijitparida]

Sure, go ahead! But please keep the existing launcher icons as they are.

[jashasweejena]

Sure, go ahead! But please keep the existing launcher icons as they are.

okay!

[jashasweejena]

Actually was facing a couple of issues, probably because I recently updated to the latest Android Studio 3.2.
Could not find aapt2-proto.jar (com.android.tools.build:aapt2-proto:0.3.1). this is one of 'em.
Fixed it by keeping google() above jcenter() on lines 6 in project level build.gradle. Should I make a separate PR for those? Another change I made was updated distributionUrl in gradle.properities to point to gradle version 4.10.2. Also there's a warning saying
The specified Android SDK Build Tools version (27.0.3) is ignored, as it is below the minimum supported version (28.0.3) for Android Gradle Plugin 3.2.1. Android SDK Build Tools 28.0.3 will be used.
What do I do about 'em? Thanks for your time 😃

[abhijitparida]

Make a separate PR.

[jashasweejena]

Make a separate PR.

Will one PR do? Or do I need to make more than one?

[abhijitparida]

Just one will do. Something like "Update build config for Android Studio 3.2".

[abhijitparida]

You might also have to modify .travis.yml if you are going to change the SDK Build Tools version.

[jashasweejena]

Just one will do. Something like "Update build config for Android Studio 3.2".

Just did one! Please check.

[jashasweejena]

You might also have to modify .travis.yml if you are going to change the SDK Build Tools version.

Oh. Android Studio didn't throw a warning or something tho!