Crashlytics Gradle plugin does not register uploadCrashlyticsMappingFile when R8 is enabled via AGP 9.3 optimization.enable

[Grouen]

[READ] Step 1: Are you in the right place?

Issues filed here should be about bugs in the code in this repository. If you have a general
question, need help debugging, or fall into some other category use one of these other channels:

• For general technical questions, post a question on StackOverflow
  with the firebase tag.
• For general Firebase discussion, use the
  firebase-talk google group.
• For help troubleshooting your application that does not fall under one of the above categories,
  reach out to the personalized Firebase support channel.

[REQUIRED] Step 2: Describe your environment

• Android Studio version: Android Studio Quail 4 | 2026.1.4 RC 1
• Firebase Component: Crashlytics Gradle plugin
• Component version: 3.0.7 (com.google.firebase:firebase-crashlytics-gradle:3.0.7)
• Android Gradle Plugin: 9.3.1
• Gradle: 9.7.0
• Google Services plugin: 4.5.0
• Firebase Android BOM: 34.17.0

[REQUIRED] Step 3: Describe the problem

On AGP 9.3+, R8 is enabled with the new optimization.enable = true DSL (docs).
R8 runs and produces mapping.txt, but Crashlytics Gradle plugin
3.0.7 does not register uploadCrashlyticsMappingFile<Variant> which should upload this mapping to firebase, this leads to unobfuscated crash reports in the Firebase console.