build: bump mobile-android-pipelines from df9c48a to b5d0ac4

Bumps [mobile-android-pipelines](https://github.com/govuk-one-login/mobile-android-pipelines) from `df9c48a` to `b5d0ac4`.
- [Release notes](https://github.com/govuk-one-login/mobile-android-pipelines/releases)
- [Commits](govuk-one-login/mobile-android-pipelines@df9c48a...b5d0ac4)

---
updated-dependencies:
- dependency-name: mobile-android-pipelines
  dependency-version: b5d0ac4f6d5ca358beab60cd46a6681fc4f60531
  dependency-type: direct:production
...

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Author: dependabot[bot]