Remove useless dependency to rhino

[qmetzler-luna]

Describe the improvement

The project is dependent on the Rhino lib but it doesn't seem to be used

Expected behaviour

The lib should import as little lib as possible

Content of this PR

Remove the Rhino dependency

How did you test?

Clone repo
Open in Android Studio
Run unit tests ✅

[FDuhen]

The rhino dependency was allowing the json-schema-validator library to use the ScriptEngineManager it one of it's classes.
I should spend more time testing to understand what is happening here with those two libraries, but removing the rhino implementation causes a ClassNotFoundException in some cases (my use case was to use a new JsonSchema with more inputs)

EDIT :
I played a little bit more with the project.
If you update the JSON_SCHEMA_V1 val and add a pattern entry like in the following example

...
  "  \"properties\": {\n" +
        "    \"ver\": {\n" +
        "      \"title\": \"Schema version\",\n" +
        "      \"description\": \"Version of the schema, according to Semantic versioning (ISO, https://semver.org/ version 2.0.0 or newer)\",\n" +
        "      \"type\": \"string\",\n" +
        "      \"pattern\":\"^\\\\d+.\\\\d+.\\\\d+.*\\\\w*\$\",\n" +
...

the json validator will crash if the Rhino dependency isn't added.

The crash will look like the following :
com.google.common.util.concurrent.ExecutionError: com.google.common.util.concurrent.ExecutionError: java.lang.NoClassDefFoundError: org/mozilla/javascript/Scriptable

[daniel-eder]

@oleksandrsarapulovgl can you take a look at this?

[oleksandrsarapulovgl]

@FDuhen seems, it's required for you specific case