fix: mobile muted

[xiaoyuhen]

fix: mobile muted

Description

Mobile device use the browser's default video controls, we don't need to handle onVolumeChange event

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Please also note any relevant details for your test configuration.

• Allow the mobile user to control video volume

[codecov-commenter]

Codecov Report

Merging #128 into master will increase coverage by 0.08%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #128      +/-   ##
==========================================
+ Coverage   50.42%   50.50%   +0.08%     
==========================================
  Files         124      124              
  Lines        1773     1770       -3     
==========================================
  Hits          894      894              
+ Misses        879      876       -3     

Impacted Files	Coverage Δ
packages/griffith/src/components/Player/Player.js	0.00% <ø> (ø)
packages/griffith/src/components/Video/Video.js	0.00% <0.00%> (ø)

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