Is the project.properties file of my Android project still used?

Question

I use the new Gradle-based build system.

I see project.properties has target=android-19 and I see AndroidManifest.xml also has:

<uses-sdk ... android:targetSdkVersion="20"/>

Then there are the dependencies, for example android.library.reference.1=barone and I see build.gradle also has these:

dependencies {
    compile project(':barone')

Answer 1

http://tools.android.com/tech-docs/new-build-system/user-guide mentions "the project.properties file of the old build system" so it does not seem to be used anymore.