Move last plugin to plugin dsl

Summary:
Last one that's available through the DSL. The Android
plugin still isn't.

Reviewed By: jknoxville

Differential Revision: D13176791

fbshipit-source-id: 6684812bb4fee1dcd9db1503e660fb019160224e

build.gradle

@@ -5,7 +5,6 @@ buildscript {
     }
     dependencies {
         classpath 'com.android.tools.build:gradle:3.2.1'
-        classpath "com.github.dcendents:android-maven-gradle-plugin:${ANDROID_MAVEN_GRADLE_PLUGIN_VERSION}"
     }
 }
 
@@ -13,6 +12,7 @@ plugins {
     id 'de.undercouch.download' version '3.4.3'
     id 'com.github.ben-manes.versions' version '0.20.0'
     id 'com.jfrog.bintray' version '1.8.4'
+    id "com.github.dcendents.android-maven" version '2.1'
 }
 
 ext.isSnapshot = { VERSION_NAME.endsWith('-SNAPSHOT') }

gradle.properties

@@ -14,10 +14,6 @@ POM_DEVELOPER_NAME=facebook
 # Shared version numbers
 LITHO_VERSION=0.20.1-SNAPSHOT
 
-# Deps for publishing
-GRADLE_BINTRAY_PLUGIN_VERSION=1.8.0
-ANDROID_MAVEN_GRADLE_PLUGIN_VERSION=2.1
-
 # Gradle internals
 org.gradle.internal.repository.max.retries=10
 org.gradle.internal.repository.initial.backoff=1250