Make a project for each client which only contains resources like names. Bundle your main application as source apk with the following plugin: ApkSourcesDependency
And finally use your main Application as dependency in your client pom. This can be generalized with a parent pom.
<dependency>
<groupId>enter.groupid.here</groupId>
<artifactId>myapp-common-stuff</artifactId>
<type>apksources</type>
</dependency>
After that just build every client project