build: abstract out groupName

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

build.gradle

@@ -29,6 +29,8 @@ buildscript {
         eddsaVersion = '0.3.0'
         bintrayPluginVersion = '1.8.4'
         mavenPluginVersion = '2.1'
+
+        groupName = 'com.wireguard.android'
     }
     dependencies {
         classpath "com.android.tools.build:gradle:$agpVersion"

tunnel/build.gradle

@@ -1,5 +1,8 @@
 apply plugin: 'com.android.library'
 
+version wireguardVersionName
+group groupName
+
 android {
     buildToolsVersion '29.0.3'
     compileSdkVersion 29

tunnel/publish.gradle

@@ -1,9 +1,6 @@
 apply plugin: 'com.github.dcendents.android-maven'
 apply plugin: 'com.jfrog.bintray'
 
-version wireguardVersionName
-group 'com.wireguard.android'
-
 install {
     repositories.mavenInstaller {
         pom.project {
@@ -12,7 +9,7 @@ install {
             url 'https://www.wireguard.com/'
 
             packaging 'aar'
-            groupId 'com.wireguard.android'
+            groupId groupName
             artifactId 'tunnel'
             version wireguardVersionName
 

ui/build.gradle

@@ -1,6 +1,9 @@
 apply plugin: 'com.android.application'
 apply plugin: 'kotlin-android'
 
+version wireguardVersionName
+group groupName
+
 // Create a variable called keystorePropertiesFile, and initialize it to your
 // keystore.properties file, in the rootProject folder.
 final def keystorePropertiesFile = rootProject.file("keystore.properties")