Update Core dependency to 3.0.0 (non snapshot) version

[kevinlind]

Description

Updating dependencies to non-snapshot versions of 3.0.0.

• Sets Core and Identity dependencies in edgeidentity module to non-snapshot versions
• Updates app module to use non-snapshot version of Core. However, as Edge Identity is released before Edge and Consent, the test app must still reference the 3.0.0-SNAPSHOT releases of these extensions.

Note, as Core 3.0.0 is not yet released, the CI build will fail.

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.

[cacheung]

Assurance should use 3.0.0-SNAPSHOT

[cacheung]

Can we also include the readme change in this PR?
https://github.com/kevinlind/aepsdk-edgeidentity-android/tree/staging-v3-dep-updates

To open and run the project, open the code/settings.gradle.kt file in Android Studio.

[emdobrin]

could we also include the readme/documentation getting started with the app doc changes with this pr?

[codecov]

Codecov Report

❗ No coverage uploaded for pull request base (staging-v3-dep-updates@16348b2). Click here to learn what that means.
The diff coverage is n/a.

Additional details and impacted files

@@                    Coverage Diff                    @@
##             staging-v3-dep-updates     #126   +/-   ##
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  Coverage                          ?   93.40%           
  Complexity                        ?      224           
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  Files                             ?       12           
  Lines                             ?      682           
  Branches                          ?      104           
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  Hits                              ?      637           
  Misses                            ?       17           
  Partials                          ?       28           

Flag	Coverage Δ
-tests	93.40% <ø> (?)

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

[emdobrin]

if we change this to 3.0.0-SNAPSHOT we can merge into staging directly, just saying 👯