fix: adjustments for shared recorder framework code

[eglitise]

While working on recorder updates for Python, I made various changes that affect all recorder frameworks, so I decided to submit them as a separate PR.
Changes include:

• Fix codeFor_executeScript for Java (wrong expected format for the argument variable)
• Move codeFor_startActivity to the base class since it will be the same for all frameworks
• Split codeFor_executeScript into handler methods with argument and without arguments. Move common method to the base class since it will be the same for all frameworks
• Remove various base class methods that are unused or already implemented in all recorder frameworks
• When encountering an unsupported locator strategy or method, do not raise error, but instead add a comment in the generated code
  • There is one situation where an error may still be raised - if codeFor_startActivity is requested for a non-Java framework. This will be resolved once codeFor_executeScriptWithArgs is implemented in all frameworks.