[MOB-6504] Fix android ci oom

[AliAbdelfattah]

Description of the change

• Increase java max heap size.
• Clean up ci config from the unused context

Type of change

• Bug fix (non-breaking change that fixes an issue)

Checklists

Development

• Lint rules pass locally
• The code changed/added as part of this pull request has been covered with tests

Code review

• This pull request has a descriptive title and information useful to a reviewer
• Issue from task tracker has a link to this pull request

[codecov]

Codecov Report

Merging #742 (90fcc36) into master (74b4cbf) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #742   +/-   ##
=======================================
  Coverage   89.81%   89.81%           
=======================================
  Files          22       22           
  Lines         599      599           
  Branches       93       93           
=======================================
  Hits          538      538           
  Misses         53       53           
  Partials        8        8           

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[TheBuggedYRN]

Should we pass it from CI environment instead?