Add nullability annotations to some generated methods #4820

Job	Run time
Validate Dagger version	9s
Bazel build	6m 25s
Bazel tests	15m 35s
Test Hilt Gradle plugin	9m 31s
Artifact Java local tests	5m 15s
Artifact Android emulator tests (API ${{ matrix.api-level }})	0s
Artifact Android local tests (AGP 7.0.0)	6m 40s
Artifact verification tests	15m 31s
Artifact Android local tests (AGP 7.1.2)	6m 23s
Artifact Android local tests (AGP 8.1.0)	4m 44s
Build Hilt Gradle plugin against latest AGP version	0s
Publish snapshot	0s
Clean up GitHub Action caches	0s
	1h 10m 13s

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