Deduplicate Log and JSONParser error handling

[shai-almog]

Motivation

• Remove duplicated error-handling code paths to centralize common fallback behavior and reduce maintenance burden.
• Make exception handling explicit and easier to extend by extracting repeated catch bodies into helper methods.
• Preserve existing logging and resource cleanup semantics while simplifying callers.

Description

• Added fallbackWriterAfterError() to CodenameOne/src/com/codename1/io/Log.java and changed the IOException and RuntimeException catch blocks in createWriter() to call it instead of duplicating code.
• Added handleParsingException(Reader, Exception, int, int, StringBuilder) to CodenameOne/src/com/codename1/io/JSONParser.java and replaced duplicate IOException/RuntimeException catch bodies with calls to this helper, retaining the original Log calls and Reader.close().
• No behavioral changes to logging or error propagation were introduced; the refactor only consolidates identical logic into named helper methods.

Testing

• No automated tests were executed for these changes.
• A local commit was created verifying the two modified files compile in the repository context (no test runner invoked).

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Codex Task