Standardize traces namespace

[joshliebe]

Task/Issue URL: https://app.asana.com/0/488551667048375/1205884745797973/f

Description

Changes traces namespace from com.duckduckgo.app.traces to com.duckduckgo.traces

Steps to test this PR

• Test that the "Start-up tracing" dev setting works as expected

[joshliebe]

Current dependencies on/for this PR:

• develop
  • PR Update to AGP 8.1.2 #3812
    • PR Standardize common-ui namespace #3862
    • PR Standardize macos namespace #3818
    • PR Standardize common-utils namespace #3816
    • PR Standardize common-ui namespace #3815
    • PR Standardize common-test namespace #3814
    • PR Standardize traces namespace #3813 👈

This stack of pull requests is managed by Graphite.