fix(FEC-8474): playback starts muted on change media - iOS

[yairans]

Description of the Changes

Issue: The auto play testing video tag is created before any user gesture, hence in change media it returns that auto play is non valid although the main video tag can auto play.
Solution: Listen to the first UI_CLICKED event (once SOURCE_SELECTED event) and call to setCapabilities with autoPlay:true

CheckLists

• changes have been done against master branch, and PR does not conflict
• new unit / functional tests have been added (whenever applicable)
• test are passing in local environment
• Travis tests are passing (or test results are not worse than on master branch :))
• Docs have been updated

[yairans]

This change assumes that by the first UI_CLICKED the main video tag is always can auto play.
But this assumption is wrong!!!.
Consider a case that the first entry request is failed, and the player is in an error state.
By click on the error overlay (for retry for example) we get UI_CLICKED but the main video tag is still cannot auto play, as it has never played.