Fix set current time to keep the same behavior for all players

[renatho]

Based on #5410

Changes proposed in this Pull Request

• It updates the setCurrentTime, in order to work in the same way for all the players. Basically, we need to have played a video in some players in order to have the frame updated when calling the setCurrentTime, so if the video wasn't played yet, we just play and pause to make it work.

Testing instructions

• Check this branch 1619-gh-Automattic/sensei-pro
• Before playing the videos, add points in the same place, and make sure the video frame will update.
• For YT, it's not working for me in the first frame (it keeps loading), but I don't think there's something we can do about that.

[codecov]

Codecov Report

Merging #5416 (e249111) into trunk (b2a3fe2) will increase coverage by 0.00%.
The diff coverage is 1.61%.

@@            Coverage Diff            @@
##              trunk    #5416   +/-   ##
=========================================
  Coverage     44.55%   44.56%           
  Complexity     8728     8728           
=========================================
  Files           412      412           
  Lines         31115    31115           
  Branches        234      234           
=========================================
+ Hits          13864    13865    +1     
+ Misses        17078    17077    -1     
  Partials        173      173           

Impacted Files	Coverage Δ
includes/admin/class-sensei-learners-main.php	4.96% <0.00%> (ø)
...cludes/class-sensei-analysis-lesson-list-table.php	0.00% <0.00%> (ø)
.../class-sensei-analysis-user-profile-list-table.php	0.00% <0.00%> (ø)
includes/class-sensei-analysis.php	8.90% <0.00%> (ø)
includes/class-sensei-grading-main.php	0.00% <0.00%> (ø)
includes/class-sensei-grading.php	11.72% <0.00%> (ø)
includes/class-sensei-list-table.php	9.09% <0.00%> (ø)
...ss-sensei-reports-overview-list-table-abstract.php	64.66% <4.54%> (ø)
.../class-sensei-learners-admin-bulk-actions-view.php	54.71% <5.26%> (ø)
...cludes/class-sensei-analysis-course-list-table.php	26.61% <7.14%> (ø)
... and 11 more

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[renatho]

This was just moved, renamed, and documented.

[aaronfc]

Looks good and works well! 🚀