Removed duplicated classes from bitcoin package

Author: rmoreliovlabs

build.gradle

@@ -1,5 +1,8 @@
 buildscript {
     repositories {
+        maven {
+            url "https://deps.rsklabs.io"
+        }
         jcenter()
     }
 
@@ -10,6 +13,9 @@ buildscript {
 
 allprojects {
     repositories {
+        maven {
+            url "https://deps.rsklabs.io"
+        }
         jcenter()
     }
 

core/build.gradle

@@ -3,11 +3,12 @@ apply plugin: 'com.google.protobuf'
 apply plugin: 'maven'
 apply plugin: 'eclipse'
 
-version = '0.15.6-rsk-2'
+version = '0.15.6-rsk-3'
 archivesBaseName = 'bitcoinj-core'
 eclipse.project.name = 'bitcoinj-core'
 
 dependencies {
+    compile 'co.rsk:native:1.2.1'
     compile 'org.bouncycastle:bcprov-jdk15to18:1.63'
     implementation 'com.google.guava:guava:28.1-android'
     compile 'com.google.protobuf:protobuf-java:3.6.1'