OS 9対応（http通信失敗)

ABVJE_Launcher_Android/AndroidManifest.xml

@@ -44,6 +44,7 @@
         android:theme="@style/ABook"
         android:allowBackup="false"
         tools:replace="android:allowBackup"
+        android:usesCleartextTraffic="true"
         android:largeHeap="true" >
         <service android:name="jp.agentec.abook.abv.cl.push.ABVFcmListenerService">
             <intent-filter>

ABVJE_Launcher_Android/build.gradle

@@ -17,8 +17,8 @@ dependencies {
 }
 
 android {
-    compileSdkVersion 21
-    buildToolsVersion '27.0.3'
+    compileSdkVersion 28
+    buildToolsVersion '28.0.3'
 
     defaultConfig {
         minSdkVersion 23