[examples] Adds gradle tasks for each example

[frankfliu]

Description

Brief description of what this PR is about

• If this change is a backward incompatible change, why must this change be made?
• Interesting edge cases to note here

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.57%. Comparing base (5c418be) to head (5f5d11b).
Report is 36 commits behind head on master.

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Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3466      +/-   ##
============================================
- Coverage     72.57%   72.57%   -0.01%     
- Complexity     7377     7389      +12     
============================================
  Files           669      672       +3     
  Lines         32658    32871     +213     
  Branches       3474     3497      +23     
============================================
+ Hits          23701    23855     +154     
- Misses         7319     7374      +55     
- Partials       1638     1642       +4     

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