…otlin 1.8

…he javarosa functionality, and can be removed once the capability to build kotlin from gradle and from maven is completed.

Added a kotlin file to `src/test` and to `src/main` to ensure compilation finds appropriate kotlin files and builds them.

…kotlin version 1.8.22

…; doesn't `like The 'java' plugin has been applied, but it is not compatible with the Android plugins.`

…gradle

….0; update `TargetSdkVersion` from 30 to 31, as required by Google Play (minSDK still at 21)

…eded by android gradle plugin

… for CircleCI to call whilst setting up the replacement android lint task.

Necessary because gradle does not support targeting kotlin at both android and the jvm in the same build, so to introduce `com.android.lint`, the `com.android.library` plugin must be removed.

…running a separate build targeted at Android bytecode

…ask in build

…SHOT.jar` and the attributes in the manifest.

…d if they don't pass.