feat: add browser.IS_SMART_TV and class names for CSS targeting devices

[misteroneill]

Description

This adds a convenience property, IS_SMART_TV, to the browser object to detect a device that is either Tizen or WebOS.

Also, added class names to the player for CSS targeting on various devices based on user agent data.

Specific Changes proposed

• Add browser.IS_SMART_TV boolean
• Add class name vjs-device-webos and vjs-device-smart-tv on WebOS Smart TVs
• Add class name vjs-device-tizen and vjs-device-smart-tv on Tizen Smart TVs
• Add class name vjs-device-android on Android devices
• Add class name vjs-device-ipad on iPads
• Add class name vjs-device-iphone on iPhones

Requirements Checklist

• Feature implemented / Bug fixed
• If necessary, more likely in a feature request than a bug fix
  • Change has been verified in an actual browser (Chrome, Firefox, IE)
  • Unit Tests updated or fixed
  • Docs/guides updated
  • Example created (starter template on JSBin)
• Reviewed by Two Core Contributors

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.84%. Comparing base (caf6d30) to head (8244446).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8676      +/-   ##
==========================================
+ Coverage   82.71%   82.84%   +0.13%     
==========================================
  Files         113      113              
  Lines        7636     7644       +8     
  Branches     1835     1838       +3     
==========================================
+ Hits         6316     6333      +17     
+ Misses       1320     1311       -9     

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[adrums86]