when import org.apache.http.util.ByteArrayBuffer;

dependencies {
    compile fileTree(include: ['*.jar'], dir: 'libs')
    compile 'com.android.support:appcompat-v7:23.0.1'

    compile 'org.jbundle.util.osgi.wrapped:org.jbundle.util.osgi.wrapped.org.apache.http.client:4.1.2'
    ...
}

Module specific build.gradle - /app/build.gradle

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.2"
    ...
    useLibrary 'org.apache.http.legacy'
    ...
}