Intents: Fix when 2 states match with same name

[balloob]

Description:

When 2 states have the exact same name, the intent matcher to find a state would fail because it would try to compare 2 state objects using <. This adds the index to the comparison so that in case all other things are equal, we pick the first match.

CC @tschmidty69

Checklist:

• The code change is tested and works locally.

If the code does not interact with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• Tests have been added to verify that the new code works.