Expose metrics plugin hooks android

[mrigankmg]

Change Type (required)

Expose onFlowBegin, onFlowEnd, onRenderEnd metrics plugin hooks for Android

• patch
• minor
• major
• N/A

Does your PR have any documentation updates?

• Updated docs
• No Update needed
• Unable to update docs

[nancywu1]

do we want to assert the 3 values from the handler or assert not null?

[mrigankmg]

I think asserting on the type should be good enough, since the value assertion should be handled in core?

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.77%. Comparing base (0e5ca93) to head (72fb5fd).
Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #591   +/-   ##
=======================================
  Coverage   89.77%   89.77%           
=======================================
  Files         331      331           
  Lines       19904    19904           
  Branches     1949     1949           
=======================================
  Hits        17868    17868           
  Misses       2022     2022           
  Partials       14       14           

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