Environment details

1. API: Storage
2. OS: macOS 10.15.2
3. Java version: 1.8.0_152
4. storage version(s): 1.104.0

Steps to reproduce

Create a gradle-based project with these (gradle 6.2):

repositories {
    mavenCentral()
    jcenter()
}

dependencies {
    implementation("com.google.cloud:google-cloud-storage:1.104.0")
}

Build it.

The build fails with

Could not find androidx.annotation:annotation:1.1.0.
     Required by:
         project :backend > com.google.cloud:google-cloud-storage:1.104.0 > com.google.api-client:google-api-client:1.30.8

Not sure if this dependency should exist in the first place. But if it should exist, then it should also be published to the repositories where google-cloud-storage is published. Or at the very least, the README should indicate if/when the dependency can be excluded and/or which repository to add to be able to use google-cloud-storage