Switch to use Charset.forName("UTF-8").name() in encoding

[cacheung]

Switching to use Charset.forName("UTF-8").name() to fix the Illegal Charset Name Exception on Android 6 (API 23). (MOB-19119).

Description

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #107 (f953db9) into dev-v2.0.1 (08c37a2) will decrease coverage by 0.14%.
The diff coverage is 33.33%.

@@              Coverage Diff               @@
##           dev-v2.0.1     #107      +/-   ##
==============================================
- Coverage       93.58%   93.44%   -0.14%     
==============================================
  Files              12       12              
  Lines             685      686       +1     
  Branches          104      104              
==============================================
  Hits              641      641              
- Misses             16       17       +1     
  Partials           28       28              

Flag	Coverage Δ
functional-tests	68.51% <33.33%> (-0.10%)	⬇️
unit-tests	93.15% <33.33%> (-0.14%)	⬇️

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Impacted Files	Coverage Δ
...adobe/marketing/mobile/edge/identity/URLUtils.java	77.27% <33.33%> (-3.68%)	⬇️