Explain why tracking software is still in Tor Browser Android

Explain why tracking software is still present in Tor Browser for Android (and desktop?) and link to proof that they are disabled, or get rid of them. Trackers at present are Mozilla Telemetry, Google Firebase Analytics, and Adjust Audience Builder, and in the past included LeanPlum. Write the answer as a support FAQ -> Tor Mobile, and link to the FAQ from the app stores: Google Play stable, alpha, F-Droid (search for "org.torproject.torbrowser"), etc.

Reports and answers from the Tor Blog in reverse chronological order: 2021-06-11 - https://blog.torproject.org/comment/291953#comment-291953 2021-03-02 - https://blog.torproject.org/comment/291288#comment-291288 2021-02-13 - https://blog.torproject.org/comment/291156#comment-291156 2020-11-09 - https://blog.torproject.org/comment/290238#comment-290238 2020-10-09 - https://blog.torproject.org/comment/289836#comment-289836 2019-11-12 - https://blog.torproject.org/comment/285436#comment-285436 2019-10-23 - https://blog.torproject.org/comment/284653#comment-284653