Update MapsActivity.java

[praveenshharma]

trafficstars

In your MapsActivity.java file, I did some changes from my side:-

1. Change in decoding Polylines method
2. Change ValueAnimator DELAY param.
3. Calculation of New Lat & Lng was not correct. We can use some custom LatLngInterPolator also. but this working fine.
4. Computing heading was also changed.

[amanjeetsingh150]

Hey @mobilegeekkk, Can you change the base of the PR branch from master to dev. It would be appreciated.