test: expose explicit test seams for package-private core internals

[nickolas-dimitrakas]

Problem

The unpublished testutils module reaches package-private members of android-core by declaring helper classes in the same package names across the module boundary (com.mparticle.AccessUtils, com.mparticle.identity.AccessUtils, com.mparticle.internal.AccessUtils, MockServer). Kotlin has no package-private visibility, so those seams break the moment any of the core classes involved is converted.

Change

The members testutils depends on become public, each annotated @VisibleForTesting and @RestrictTo(LIBRARY_GROUP):

• MessageHandler (class), MessageManager.mMessageHandler and mInstallType, BaseHandler.await
• UploadHandler.mApiClient and setApiClient
• ConfigManager.deleteConfigManager and clearMpid
• KitFrameworkWrapper.mKitManager, getFrameworkLoadAttempted, setKitManager, setKitsLoaded
• MParticleIdentityClientImpl endpoint path constants and getUrl overloads, MParticleUserImpl.setUserIdentities
• MParticleBaseClientImpl.mApiKey

No behaviour, name, type or nullability changes. Facade classes (MParticle, MParticleOptions, IdentityApi, MPUrl) and every class proguard.pro keeps in full are untouched; PushRegistrationHelper.setPushRegistration stays package-private for that reason. MessageHandler uses @VisibleForTesting(otherwise = PACKAGE_PRIVATE) because the default scope is not valid on a class.

Verification

• testutils and the core and kit-base unit and androidTest source sets compile.
• :android-core:testDebugUnitTest 310/310 and :android-kit-base:testDebugUnitTest 89/89, matching main; ktlintCheck and core lint pass with 0 errors.
• javap -public of the R8-processed release classes.jar is identical to main for every class proguard.pro names, except MParticleIdentityClientImpl, where the two internally used getUrl overloads now appear public under their obfuscated names. No class kept with { *; } changed.

🤖 Generated with Claude Code

[github-actions]

📦 SDK Size Impact Report

What the SDK adds to a minified release APK.

Measured against an empty baseline app. Unlike the Rokt kit, android-core ships no Compose and no resources, so there is nothing here that a host app would already provide.

mParticle Core SDK

Metric	Target branch	This PR	Change
APK size	119.77 KB	119.79 KB	+18 bytes
Download size	117.59 KB	117.60 KB	+16 bytes
Dex bytes	213.77 KB	213.75 KB	-12 bytes

➡️ SDK size impact change is minimal.

Raw measurements

Target branch:

{"baseline_dex_bytes": 0, "baseline_download_bytes": 2516, "baseline_install_bytes": 7532, "core_dex_bytes": 218896, "core_download_bytes": 122926, "core_install_bytes": 130177}

This PR:

{"baseline_dex_bytes": 0, "baseline_download_bytes": 2513, "baseline_install_bytes": 7529, "core_dex_bytes": 218884, "core_download_bytes": 122939, "core_install_bytes": 130192}

_{Measured 5cc29ef merged into 89e392b}

[cursor]

PR Summary

Low Risk
Visibility modifications and test annotations with no behavioral or business logic changes.

Overview
Updates several package-private classes, fields, and methods in android-core to public visibility to support cross-module test utilities.

All updated members are annotated with @VisibleForTesting and @RestrictTo(RestrictTo.Scope.LIBRARY_GROUP) to restrict external usage while preserving access across internal modules and tests without altering runtime behavior.

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