更新到以下代码

plugins {
   ...
   id "com.google.protobuf" version "0.9.4"
}

字符串
和依赖关系

dependencies {
    ...
    implementation  "androidx.datastore:datastore:1.0.0"
    implementation  "com.google.protobuf:protobuf-javalite:3.18.0"
}

型
还有

protobuf {
    protoc {
        artifact = 'com.google.protobuf:protoc:3.8.0'
    }
    generateProtoTasks {
        all().configureEach { task ->
            task.builtins {
                java {
                    option "lite"
                }
            }
        }
    }
}

型