Resolves #48 Native notifications

android/app/src/main/AndroidManifest.xml

@@ -6,6 +6,7 @@
          to allow setting breakpoints, to provide hot reload, etc.
     -->
     <uses-permission android:name="android.permission.INTERNET"/>
+    <uses-permission android:name="android.permission.VIBRATE" />
 
     <!-- io.flutter.app.FlutterApplication is an android.app.Application that
          calls FlutterMain.startInitialization(this); in its onCreate method.
@@ -17,6 +18,11 @@
         android:label="HA Client"
         android:icon="@mipmap/ic_launcher"
         android:usesCleartextTraffic="true">
+
+        <meta-data
+            android:name="com.google.firebase.messaging.default_notification_channel_id"
+            android:value="ha_notify" />
+
         <activity
             android:name=".MainActivity"
             android:launchMode="singleTop"