Fix for ESP32 ADU sample to use installedCriteria for version comparison

[ewertons]

Purpose

Fix for github issue https://github.com/Azure-Samples/iot-middleware-freertos-samples/issues/210

Does this introduce a breaking change?

[ ] Yes
[x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[x] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

Just run the ESP32 ADU sample as usual.

What to Check

Verify the update happens as expected from version 1.0 to 1.1, and the update request gets rejected after the device boots up with the new image version (1.1).

Other Information

[ewertons]

After a meeting with ADU engineers, we got this summary: we will modify our sample code to handle the update manifest as such:

• Sample gets the version of the current device image (e.g, 1.0)
• Sample checks the step installedCriteria (e.g., 1.1)
• If the data is different in these two, consume the update request. Otherwise, ignore.