feat: add BatchListener to forward mParticle batches to Rokt SDK

[jaissica12]

Instructions

1. PR target branch should be against development
2. PR title name should follow this format: https://github.com/mParticle/mparticle-workflows/blob/main/.github/workflows/pr-title-check.yml
3. PR branch prefix should follow this format: https://github.com/mParticle/mparticle-workflows/blob/main/.github/workflows/pr-branch-check-name.yml

Summary

• Implements KitIntegration.BatchListener interface on RoktKit, enabling the kit to receive full mParticle event batches via the logBatch(JSONObject) callback
• Forwards the raw batch JSON to the Rokt SDK via the new Rokt.receiveMParticleBatch() API (added in sdk-android-source feat/mp-batch-stream)
• This enables the Rokt Transactions API to receive the full mParticle event stream (custom events, commerce events, screen views, session events) alongside native Rokt SDK events
• Errors during batch forwarding are caught and logged as warnings — they do not crash the host app or interfere with other kit functionality
• No changes to existing placement execution, event streaming, or identity forwarding logic

Testing Plan

• Was this tested locally? If not, explain why.
• Pending integration test: requires a published Rokt SDK version with Rokt.receiveMParticleBatch() (from sdk-android-source/feat/mp-batch-stream)
• Unit test to verify logBatch() calls Rokt.receiveMParticleBatch() with the correct JSON string
• Unit test to verify exceptions in receiveMParticleBatch() are caught and do not propagate
• E2E validation: confirm batch events appear in Transactions API /v2/sessions/events response

Reference Issue (For mParticle employees only. Ignore if you are an outside contributor)

• Closes https://go.mparticle.com/work/REPLACEME