RUM-1218: Prepare release 2.2.0

[0xnm]

What does this PR do?

This PR prepares release 2.2.0 of Android SDK.

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 #1650 (edbbeb3) into develop (c757420) will decrease coverage by 0.22%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1650      +/-   ##
===========================================
- Coverage    83.86%   83.64%   -0.22%     
===========================================
  Files          456      456              
  Lines        15692    15689       -3     
  Branches      2346     2345       -1     
===========================================
- Hits         13160    13123      -37     
- Misses        1922     1941      +19     
- Partials       610      625      +15     

see 19 files with indirect coverage changes