Fix leak caused by repeated calls to WeakReference.get()

[0xnm]

Port of commit from #1763 in our repo, to be able to run all the checks.

Review checklist (to be filled by reviewers)

• Feature or bugfix MUST have appropriate tests (unit, integration, e2e)
• Make sure you discussed the feature or bugfix with the maintaining team in an Issue
• Make sure each commit and the PR mention the Issue number (cf the CONTRIBUTING doc)

[codecov-commenter]

Codecov Report

Merging #1779 (75bb88a) into develop (c048dcd) will increase coverage by 0.05%.
Report is 2 commits behind head on develop.
The diff coverage is 100.00%.

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1779      +/-   ##
===========================================
+ Coverage    83.36%   83.41%   +0.05%     
===========================================
  Files          465      465              
  Lines        16348    16349       +1     
  Branches      2456     2457       +1     
===========================================
+ Hits         13627    13636       +9     
+ Misses        2047     2039       -8     
  Partials       674      674              

Files	Coverage Δ
.../android/rum/internal/domain/scope/RumViewScope.kt	93.94% <100.00%> (-0.15%)	⬇️

... and 18 files with indirect coverage changes