Updates Classy Taxi Java's minimum compileSdkVersion and targetSdkVersion to 30
Updates Classy Taxi Java's minimum compileSdkVersion and targetSdkVersion to 30

This is required by the Play store now

Bug: 193796318
Change-Id: Ic70cfa39cd50eda9853409e1f1a625bc784806d3

android/play-billing-samples,android/play-billing-samples,android/play-billing-samples,android/play-billing-samples,android/play-billing-samples