[build] Fix publication of java-pinning-android

The version and group property was not set, since it was declared in
java-conventions. Move it into common-conventions to make those
properties available in java-pinning-android.

build-logic/src/main/groovy/eu.geekplace.javapinning.common-conventions.gradle

@@ -18,6 +18,10 @@ repositories {
 	mavenLocal()
 }
 
+group = 'eu.geekplace.javapinning'
+
+version readVersionFile()
+
 def getAndroidRuntimeJar(androidApiLevel) {
 	def androidHome = getAndroidHome()
 	def androidJar = new File("$androidHome/platforms/android-${androidApiLevel}/android.jar")
@@ -37,3 +41,14 @@ def getAndroidHome() {
 	if (!androidHome.isDirectory()) throw new Exception("Environment variable ANDROID_HOME is not pointing to a directory")
 	return androidHome
 }
+
+def readVersionFile() {
+	def versionFile = new File(rootDir, 'version')
+	if (!versionFile.isFile()) {
+		throw new Exception("Could not find version file")
+	}
+	if (versionFile.text.isEmpty()) {
+		throw new Exception("Version file does not contain a version")
+	}
+	versionFile.text.trim()
+}

build-logic/src/main/groovy/eu.geekplace.javapinning.java-conventions.gradle

@@ -17,8 +17,6 @@ plugins {
 	id 'eu.geekplace.javapinning.publish-conventions'
 }
 
-version readVersionFile()
-
 ext {
 	gitCommit = getGitCommit()
 	documentationDir = new File(projectDir, 'documentation')
@@ -28,8 +26,6 @@ ext {
 	junitVersion = '5.11.3'
 }
 
-group = 'eu.geekplace.javapinning'
-
 java {
 	sourceCompatibility = javaVersion
 	targetCompatibility = sourceCompatibility
@@ -186,14 +182,3 @@ def getGitCommit() {
 	assert !gitCommit.isEmpty()
 	gitCommit
 }
-
-def readVersionFile() {
-	def versionFile = new File(rootDir, 'version')
-	if (!versionFile.isFile()) {
-		throw new Exception("Could not find version file")
-	}
-	if (versionFile.text.isEmpty()) {
-		throw new Exception("Version file does not contain a version")
-	}
-	versionFile.text.trim()
-}

java-pinning-android/build.gradle

@@ -4,6 +4,9 @@ plugins {
 	id 'com.android.library'
 }
 
+description = """\
+Java Pinning's API for Android (min SDK level ${minAndroidSdk}"""
+
 android {
     compileSdkVersion 30