Update androidx.test and friends

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
com.google.truth:truth	1.4.2 -> 1.4.3
androidx.test.ext:junit	1.1.5 -> 1.2.1
androidx.test:runner	1.5.2 -> 1.6.1
androidx.test:rules	1.5.0 -> 1.6.1
androidx.test:core	1.5.0 -> 1.6.1

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Release Notes

google/truth (com.google.truth:truth)

### [`v1.4.3`](https://togithub.com/google/truth/releases/tag/v1.4.3): 1.4.3 - Added more nullness information to our APIs (in the form of [JSpecify](https://jspecify.dev/) annotations). This could lead to additional warnings (or even errors) for users of Kotlin and other nullness checkers. Please [report any problems](https://togithub.com/google/truth/issues/new). ([`ee680cb`](https://togithub.com/google/truth/commit/ee680cbaf)) - Deprecated `Subject.Factory` methods for Java 8 types. We won't remove them, but you can simplify your code by migrating off them: Just replace `assertAbout(foos()).that(foo)` with `assertThat(foo)` (or `about(foos()).that(foo)` with `that(foo)`). ([`59e7a50`](https://togithub.com/google/truth/commit/59e7a5065))

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