fix: update posthog-android to 3.40.2

[marandaneto]

Problem

Consumers of this package should pick up the latest Android native dependency update in the published release, and CI should actually rebuild Android when the library's Android dependency changes.

Changes

• bump com.posthog:posthog-android in android/build.gradle from 3.39.1 to 3.40.2
• add a patch changeset for publishing the dependency update
• disable Turbo cache reuse for build:android so CI performs a real Android build instead of replaying stale cached logs

Checklist

• Tests for new code (if applicable)
• Accounted for the impact of any changes across iOS and Android platforms
• Accounted for backwards compatibility of any changes (no breaking changes!)

If releasing new changes

• Ran pnpm changeset to generate a changeset file
• Added the release label to the PR

[marandaneto]

depends on PostHog/posthog-android#484

[marandaneto]

otherwise it'll always use the cached version and never fail