Add default notification icon

app/src/main/java/chat/rocket/android/push/GcmListenerService.kt

+package chat.rocket.android.push
+
+import android.os.Bundle
+import com.google.android.gms.gcm.GcmListenerService
+
+class GcmListenerService : GcmListenerService() {
+
+    override fun onMessageReceived(from: String?, data: Bundle?) {
+        println("UBA BA!")
+    }
+}
\ No newline at end of file

app/src/main/res/drawable-anydpi-v21/rocket_chat_notification.xml

+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportHeight="48.0"
+    android:viewportWidth="48.0">
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M44.99,23.47C44.99,21.42 44.38,19.45 43.16,17.62C42.07,15.97 40.54,14.52 38.62,13.29C34.91,10.92 30.03,9.62 24.88,9.62C23.16,9.62 21.47,9.77 19.82,10.05C18.8,9.1 17.61,8.24 16.35,7.57C9.6,4.3 4,7.49 4,7.49C4,7.49 9.21,11.76 8.36,15.49C6.03,17.8 4.77,20.58 4.77,23.47C4.77,23.48 4.77,23.49 4.77,23.5C4.77,23.51 4.77,23.51 4.77,23.52C4.77,26.42 6.03,29.2 8.36,31.5C9.21,35.24 4,39.5 4,39.5C4,39.5 9.6,42.69 16.35,39.43C17.61,38.75 18.8,37.89 19.82,36.94C21.47,37.23 23.16,37.37 24.88,37.37C30.03,37.37 34.91,36.07 38.62,33.7C40.54,32.48 42.07,31.02 43.16,29.38C44.38,27.55 44.99,25.58 44.99,23.53C44.99,23.52 44.99,23.51 44.99,23.5L44.99,23.47ZM24.88,12.53C34.41,12.53 42.14,17.45 42.14,23.52C42.14,29.6 34.41,34.52 24.88,34.52C22.76,34.52 20.73,34.28 18.85,33.83C16.94,36.12 12.74,39.31 8.67,38.28C9.99,36.86 11.96,34.45 11.54,30.5C9.09,28.6 7.63,26.17 7.63,23.52C7.63,17.45 15.35,12.53 24.88,12.53Z" />
+    <path
+        android:fillColor="#FFFFFFFF"
+        android:pathData="M24.88,26.17C26.15,26.17 27.17,25.14 27.17,23.88C27.17,22.61 26.15,21.59 24.88,21.59C23.62,21.59 22.59,22.61 22.59,23.88C22.59,25.14 23.62,26.17 24.88,26.17ZM32.85,26.17C34.12,26.17 35.14,25.14 35.14,23.88C35.14,22.61 34.12,21.59 32.85,21.59C31.59,21.59 30.56,22.61 30.56,23.88C30.56,25.14 31.59,26.17 32.85,26.17ZM16.91,26.17C18.18,26.17 19.2,25.14 19.2,23.88C19.2,22.62 18.18,21.59 16.91,21.59C15.65,21.59 14.62,22.62 14.62,23.88C14.62,25.14 15.65,26.17 16.91,26.17L16.91,26.17Z" />
+</vector>

app/src/main/res/values/api_keys.xml

+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="gcm_sender_id">673693445664</string>
+</resources>
\ No newline at end of file