Add this to android/build.gradle to override the compiled and build version on every react native component

build.gradle

// override build.gradle on every js module.
subprojects {
    afterEvaluate {project ->
        if (project.hasProperty("android")) {
            android {
                compileSdkVersion 26
                buildToolsVersion '26.0.2'
            }
        }
    }
}