Upgrades appservices to 86.1.0

[tarikeshaq]

Upgrades appservices to 86.1.0, this is non-breaking and has some improvements and bug fixes,

Most notably for ios the nimbus bug fix that merged with 85.4.2 #4597 but that was a cherrypick, so this release has it as well

We're hoping to get this in for v40

cc: @nbhasin2

Changelog:

v86.1.0 (2021-10-27)

Full Changelog

⛅️🔬🔭 Nimbus

What's New

• Rollouts: allows winning branch promotion and targeting rollouts of features. #4567.
  • for both Android and iOS.

What's fixed

• Fixed a bug in iOS where the installation date would be set to start of EPOCH (#4597)
• Fixed a bug in Android where we were missing disqualification events after a global opt-out (#4606)

Push

• We've changed how the push database is opened, which should mean we now automatically handle
  some kinds of database corruption.

General

What's changed

• The bundled version of Glean has been updated to v42.0.1.
  See the Glean Changelog for full details.
  (Note there is a breaking change in Rust, but that doesn't impact consumers of Application Services)