[BUG] NullPointerException on ETResponse.getObject

[h-valer]

Describe the bug
A clear and concise description of what the bug is.
Method getObject() do a direct access to .getObject(), but getResult can be null, causing a null pointer exception.

To Reproduce
Steps to reproduce the behavior.
Instantiate a new ETResponse.java with individualResults.size() equals to zero.

Expected behavior
A clear and concise description of what you expected to happen.
Expect the function getObject() to fail gracefully.

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Code snippet
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Environment

• SDK Version [e.g. 1.1.0]
• Java/ JDK version

The bug has the severity

• Critical: The defect affects critical functionality or critical data. It does not have a workaround.
• Major: The defect affects major functionality or major data. It has a workaround but is not obvious and is difficult.
• Minor: The defect affects minor functionality or non-critical data. It has an easy workaround.
• Trivial: The defect does not affect functionality or data. It does not even need a workaround. It does not impact productivity or efficiency. It is merely an inconvenience.

Additional context
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