Use Constants from Core and add friendly name

[prudrabhat]

Description

EdgeIdentityExtension currently uses local constants for EventType and EventSource. These constants are now provided in Core. Use the constants from core.

Related Issue

MOB-17816

Motivation and Context

EdgeIdentityExtension currently uses local constants for EventType and EventSource. These constants are now provided in Core. Use the constants from core.

How Has This Been Tested?

• Unit tests
• build verification

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 #79 (ac64470) into dev-v2.0.0 (afebb93) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@              Coverage Diff               @@
##           dev-v2.0.0      #79      +/-   ##
==============================================
- Coverage       93.33%   93.32%   -0.01%     
==============================================
  Files              12       12              
  Lines             675      674       -1     
  Branches          103      103              
==============================================
- Hits              630      629       -1     
  Misses             16       16              
  Partials           29       29              

Flag	Coverage Δ
functional-tests	67.36% <100.00%> (-0.05%)	⬇️
unit-tests	93.03% <100.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...adobe/marketing/mobile/edge/identity/Identity.java	92.04% <ø> (ø)
.../marketing/mobile/edge/identity/IdentityState.java	95.83% <ø> (ø)
...keting/mobile/edge/identity/IdentityExtension.java	99.15% <100.00%> (-0.01%)	⬇️