Add feature double tap for fullscreen toggle

[Ortes]

[codecov[bot]]

Codecov Report

:x: Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review. :white_check_mark: Project coverage is 43.89%. Comparing base (d228479) to head (d276d60). :warning: Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
lib/src/chewie_player.dart	0.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #932      +/-   ##
==========================================
+ Coverage   43.84%   43.89%   +0.04%     
==========================================
  Files          21       21              
  Lines        1601     1604       +3     
==========================================
+ Hits          702      704       +2     
- Misses        899      900       +1     

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