Deps: Extract automattic publish to s3 version to settings build gradle

Author: ParaskP7

settings.gradle

@@ -1,12 +1,13 @@
 pluginManagement {
     gradle.ext.kotlinVersion = '1.6.10'
     gradle.ext.agpVersion = '7.2.1'
+    gradle.ext.automatticPublishToS3Version = '0.7.0'
 
     plugins {
         id "com.android.library" version gradle.ext.agpVersion
         id "com.android.application" version gradle.ext.agpVersion
         id "org.jetbrains.kotlin.android" version gradle.ext.kotlinVersion
-        id "com.automattic.android.publish-to-s3" version "0.7.0"
+        id "com.automattic.android.publish-to-s3" version gradle.ext.automatticPublishToS3Version
     }
     repositories {
         maven {