Robot/Keyboard test doesn't work at first attempt (Bugfix)

[p-gentili]

WARNING: This modifies com.canonical.certification::sru

Description

See https://certification.canonical.com/hardware/202406-34144/submission/385662/test/203749/result/43085479/

When loading the ZapperHid robot library, two things happen:

1. HID device is re-configured to mouse,pointer,keyboard
2. HID status gets reset

Since this happens within the same API call, the keyboard disappears for a moment making the input event listener crash.

Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python3.12/threading.py", line 1073, in _bootstrap_inner
    self.run()
  File "/tmp/nest-dte_n5h3.406f1a6a482f12570d1010bc16fdf8c76a09be410a66e78ecff990bfc353620b/zapper_keyboard_test.py", line 60, in run
    self._read_keyboard_events()
  File "/tmp/nest-dte_n5h3.406f1a6a482f12570d1010bc16fdf8c76a09be410a66e78ecff990bfc353620b/zapper_keyboard_test.py", line 71, in _read_keyboard_events
    data = os.read(self._event_no, self.EVENT_BIN_SIZE)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
OSError: [Errno 19] No such device

This PR adds another small robot API call, with an empty body just for the sake of re-configuring the HID device. Then, a busy loop waits until the device comes back.

Resolved issues

N/A

Documentation

N/A

Tests

Tested side-loading the device. Problem happens 100% of the time if

1. Zapper FW is up to date
2. The test case runs for the first time

[p-gentili]

DRAFT because pending approval of another related change.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 46.14%. Comparing base (5ebfbaf) to head (57b5e7d).
Report is 136 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1459   +/-   ##
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  Coverage   46.13%   46.14%           
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  Files         367      367           
  Lines       39206    39212    +6     
  Branches     6633     6634    +1     
=======================================
+ Hits        18088    18094    +6     
  Misses      20421    20421           
  Partials      697      697           

Flag	Coverage Δ
provider-base	20.69% <100.00%> (+0.03%)	⬆️

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[p-gentili]

DRAFT because pending approval of another related change.

Not the case anymore, compatibility will be maintained.

[fernando79513]

LGTM +1!