Update Android SDK Version

• Updates from 3.8.3 to 3.9.0

Author: Nightsd01

android/build.gradle

@@ -22,7 +22,7 @@ dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     compile "com.facebook.react:react-native:${safeExtGet('reactNativeVersion', '+')}"
 
-    compile('com.onesignal:OneSignal:3.8.3') {
+    compile('com.onesignal:OneSignal:3.9.0') {
         // Exclude com.android.support(Android Support library) as the version range starts at 26.0.0
         //    This is due to compileSdkVersion defaulting to 23 which cant' be lower than the support library version
         //    And the fact that the default root project is missing the Google Maven repo required to pull down 26.0.0+
@@ -80,4 +80,4 @@ plugins {
     id 'com.onesignal.androidsdk.onesignal-gradle-plugin' version '0.8.1'
 }
 apply plugin: 'com.onesignal.androidsdk.onesignal-gradle-plugin'
-*/
+*/