fix: start CallActivity in a new task (WPB-6437)

[ohassine]

WPB-6437 Move calling UIs to be displayed on a separate activity

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PR Submission Checklist for internal contributors

• The PR Title

  • conforms to the style of semantic commits messages¹ supported in Wire's Github Workflow²
  • contains a reference JIRA issue number like SQPIT-764
  • answers the question: If merged, this PR will: ... ³

• The PR Description

  • is free of optional paragraphs and you have filled the relevant parts to the best of your ability

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What's new in this PR?

Issues

Currently we need to finish the activity to minimise the screen which is resource consumer.

Solutions

• Start CallActivity in a new task so we don't need to re-create the activity(with its renderers when video is enabled) when it was minimised.

• Fixed a memory leak

Needs releases with:

• GitHub link to other pull request

Testing

Test Coverage (Optional)

• I have added automated test to this contribution

How to Test

Briefly describe how this change was tested and if applicable the exact steps taken to verify that it works as expected.

Notes (Optional)

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PR Post Submission Checklist for internal contributors (Optional)

• Wire's Github Workflow has automatically linked the PR to a JIRA issue

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PR Post Merge Checklist for internal contributors

• If any soft of configuration variable was introduced by this PR, it has been added to the relevant documents and the CI jobs have been updated.

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References

1. https://sparkbox.com/foundry/semantic_commit_messages
2. https://github.com/wireapp/.github#usage
3. E.g. feat(conversation-list): Sort conversations by most emojis in the title #SQPIT-764.

[github-actions]

Test Results

924 tests  ±0   924 ✅ ±0   10m 12s ⏱️ - 2m 51s
123 suites ±0     0 💤 ±0 
123 files   ±0     0 ❌ ±0 

Results for commit 4c01401. ± Comparison against base commit d099c02.

♻️ This comment has been updated with latest results.

[github-actions]

APKs built during tests are available here. Scroll down to Artifacts!

[AndroidBob]

Build 4538 succeeded.

The build produced the following APK's:

• com.wire.android-v4.8.0(9552235)(9552235)-staging-compat.apk

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 44.19%. Comparing base (d099c02) to head (4c01401).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2952      +/-   ##
===========================================
- Coverage    44.25%   44.19%   -0.06%     
===========================================
  Files          444      444              
  Lines        14458    14455       -3     
  Branches      2476     2475       -1     
===========================================
- Hits          6399     6389      -10     
- Misses        7364     7373       +9     
+ Partials       695      693       -2     

Files	Coverage Δ
.../wire/android/ui/calling/SharedCallingViewModel.kt	63.15% <ø> (-0.16%)	⬇️
...kotlin/com/wire/android/ui/calling/CallActivity.kt	0.00% <0.00%> (ø)

... and 2 files with indirect coverage changes

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[github-actions]

APKs built during tests are available here. Scroll down to Artifacts!

[AndroidBob]

Build 4549 succeeded.

The build produced the following APK's:

• com.wire.android-v4.8.0(9568852)(9568852)-staging-compat.apk