No issue: Update changelog for v1.4 and v1.5 releases.

[mcomella]

Pull Request checklist

• [ ] This PR includes thorough tests or an explanation of why it does not
• [ ] This PR includes a CHANGELOG entry or does not need one
• [ ] The UI tests are passing after this PR (./gradlew connectedAmazonWebViewDebugAndroidTest)
• [ ] I have considered adding QA labels on the associated issue (not this PR; qa-ready or qa-denied)

[codecov-commenter]

Codecov Report

Merging #335 into master will not change coverage. The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #335   +/-   ##
=========================================
  Coverage     21.85%   21.85%           
  Complexity      127      127           
=========================================
  Files            92       92           
  Lines          1922     1922           
  Branches        298      298           
=========================================
  Hits            420      420           
  Misses         1464     1464           
  Partials         38       38           

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