[MOB-4686] Feature/add setDebugEnabled Android API

[ahmed1hisham]

Summary of Changes

• Added setDebugEnabled API to enable/disable the Instabug debug logs.
• API added for Android only
• Unit test added to java test files only

Checklist

• In addition to adding the new API to Dart, I have also added its implementation to both iOS and Android.
• I have added at least 1 unit test in Dart for the new API and made sure the tests pass locally.
• I have updated README.md to add the new API.

[codecov]

Codecov Report

Merging #174 (b4d76a2) into master (3edf75d) will decrease coverage by 0.56%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #174      +/-   ##
==========================================
- Coverage   69.21%   68.64%   -0.57%     
==========================================
  Files          14       14              
  Lines         484      488       +4     
==========================================
  Hits          335      335              
- Misses        149      153       +4     

Impacted Files	Coverage Δ
lib/Instabug.dart	82.82% <0.00%> (-3.49%)	⬇️

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[AliAbdelfattah]

Well done! 👏

[InstabugCI]

	1 Warning
⚠️	Please include a CHANGELOG entry. You can find it at CHANGELOG.md.

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