Change flutter_sunset_alarm to just sunset_alarm.

android/app/src/main/AndroidManifest.xml

@@ -1,6 +1,6 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android">
     <application
-        android:label="flutter_sunset_alarm"
+        android:label="sunset_alarm"
         android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
@@ -46,5 +46,5 @@
     <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
     <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION"/>
     <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
-    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM"/>   
+    <uses-permission android:name="android.permission.SCHEDULE_EXACT_ALARM"/>
 </manifest>