fix(AgmMarker): animationChange output

[ghost]

adds animationChange output to connect to google's animation_changed event, and
enable two way binding

fixes: #1681

[codecov]

Codecov Report

Merging #1683 into master will increase coverage by 0.38%.
The diff coverage is 80%.

@@            Coverage Diff            @@
##           master   #1683      +/-   ##
=========================================
+ Coverage   39.32%   39.7%   +0.38%     
=========================================
  Files          40      40              
  Lines        1770    1778       +8     
  Branches      145     144       -1     
=========================================
+ Hits          696     706      +10     
+ Misses       1072    1071       -1     
+ Partials        2       1       -1

Impacted Files	Coverage Δ
packages/core/services/managers/marker-manager.ts	78.84% <100%> (+11.49%)	⬆️
packages/core/directives/marker.ts	37.5% <40%> (+0.11%)	⬆️

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