migrate push plugin to androidx

NcmbFcmPlugin/build.gradle

@@ -6,7 +6,7 @@ buildscript {
         jcenter()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.0.0'
+        classpath 'com.android.tools.build:gradle:3.2.0'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files

NcmbFcmPlugin/gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,6 @@
-#Fri Nov 06 12:31:10 JST 2015
+#Thu Sep 12 15:10:05 ICT 2019
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-4.6-all.zip

NcmbFcmPlugin/ncmbfcmplugin/build.gradle

@@ -1,8 +1,8 @@
 apply plugin: 'com.android.library'
 
 android {
-    compileSdkVersion 26
-    buildToolsVersion "26.0.2"
+    compileSdkVersion 28
+    buildToolsVersion "28.0.3"
 
     defaultConfig {
         minSdkVersion 14
@@ -24,10 +24,11 @@ repositories {
 }
 
 dependencies {
-    compileOnly fileTree(include: ['*.jar'], dir: '../libs')
-    implementation 'com.android.support:appcompat-v7:26.1.0'
-    implementation 'com.google.firebase:firebase-messaging:17.1.0'
-    implementation 'com.google.android.gms:play-services-base:15.0.1'
+    implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.annotation:annotation:1.1.0'
+    implementation 'com.google.firebase:firebase-messaging:20.0.0'
+    implementation 'com.google.android.gms:play-services-base:17.0.0'
+    compileOnly fileTree(dir: 'src/libs', include: ['*.aar', '*.jar'], exclude: [])
 }
 
 android.libraryVariants.all { variant ->

NcmbFcmPlugin/ncmbfcmplugin/src/main/java/com/nifcloud/mbaas/ncmbfcmplugin/FCMInit.java

@@ -20,9 +20,10 @@
 import android.content.Context;
 import android.content.pm.PackageManager;
 import android.os.Build;
-import android.support.annotation.NonNull;
 import android.util.Log;
 
+import androidx.annotation.NonNull;
+
 import com.google.android.gms.common.ConnectionResult;
 import com.google.android.gms.common.GoogleApiAvailability;
 import com.google.android.gms.tasks.OnCanceledListener;

NcmbFcmPlugin/ncmbfcmplugin/src/main/java/com/nifcloud/mbaas/ncmbfcmplugin/NCMBFirebaseMessagingService.java

@@ -25,9 +25,10 @@
 import android.media.RingtoneManager;
 import android.net.Uri;
 import android.os.Bundle;
-import android.support.v4.app.NotificationCompat;
 import android.util.Log;
 
+import androidx.core.app.NotificationCompat;
+
 import com.google.firebase.messaging.FirebaseMessagingService;
 import com.google.firebase.messaging.RemoteMessage;
 import com.unity3d.player.UnityPlayer;