fix(audio_fingerprinting): trigger audio fingerprint with click

[vringar]

This is required as AudioContext doesn't work without user interaction

[codecov-commenter]

Codecov Report

Base: 52.56% // Head: 51.14% // Decreases project coverage by -1.42% ⚠️

Coverage data is based on head (c4f17a5) compared to base (e58748f).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1025      +/-   ##
==========================================
- Coverage   52.56%   51.14%   -1.42%     
==========================================
  Files          34       34              
  Lines        3394     3394              
==========================================
- Hits         1784     1736      -48     
- Misses       1610     1658      +48     

Impacted Files	Coverage Δ
openwpm/commands/profile_commands.py	54.71% <0.00%> (-26.42%)	⬇️
openwpm/errors.py	80.95% <0.00%> (-19.05%)	⬇️
openwpm/command_sequence.py	89.23% <0.00%> (-4.62%)	⬇️
openwpm/browser_manager.py	70.60% <0.00%> (-4.28%)	⬇️
openwpm/utilities/platform_utils.py	73.11% <0.00%> (-3.23%)	⬇️
openwpm/deploy_browsers/deploy_firefox.py	21.95% <0.00%> (-2.44%)	⬇️
openwpm/commands/browser_commands.py	27.73% <0.00%> (-1.57%)	⬇️
openwpm/task_manager.py	79.11% <0.00%> (-0.45%)	⬇️

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[englehardt]

Non-blocking: do you know if this is an AudioContext spec change where the API actually is gated behind user interaction, or whether there is simply a race condition here?

[vringar]

There was an error message in the console saying smt like Audio context is unavailable without user interaction. And with some googling I found people also reported the same for Chrome. So maybe audio fingerprinting is just dead now?

However even with the click it was slightly racy, that's why I put the sleep 5 after the click