Split building the debug APK in CI

[jmartinesp]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

• Make the build.yml CI flow build gplay and fdroid variants separately.
• Lower the max heap size to 7GB to avoid the flow from cancelling itself.
• Only upload the universal APKs as result artefacts, uploading every single apk takes a long time.

Motivation and context

Building them both at the same time is causing OOM errors and automatic cancellation of the CI flow.

Tests

If the CI works, hopefully it means it's fixed.

Tested devices

• Physical
• Emulator
• OS version(s):

Checklist

• Changes have been tested on an Android device or Android emulator with API 23
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request includes a new file under ./changelog.d. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 73.47%. Comparing base (6d924c3) to head (08658a7).

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #2774       +/-   ##
============================================
+ Coverage         0   73.47%   +73.47%     
============================================
  Files            0     1517     +1517     
  Lines            0    36422    +36422     
  Branches         0     7012     +7012     
============================================
+ Hits             0    26760    +26760     
- Misses           0     5997     +5997     
- Partials         0     3665     +3665     

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[bmarty]

LGTM, thanks for working on this!