add readme with initial setup notes

README.md

@@ -0,0 +1,6 @@
+# AutoBrightnessDelay
+Add a 500ms delay after screen turning on before Auto/Adaptive Brightness is
+enabled.
+### Notes
+You will need to manually grant "Notifications" permission and also the
+permission to "Modify system settings". 

app/src/main/java/us/beckmeyer/autobrightnessdelay/AutoBrightnessDelayService.kt

@@ -57,7 +57,7 @@ class AutoBrightnessDelayService : Service() {
       NOTIFICATION_ID,
       NotificationCompat.Builder(this, CHANNEL_ID)
         .setContentTitle("AutoBrightnessDelay running")
-        .setSmallIcon(android.R.drawable.ic_menu_view)
+        .setSmallIcon(R.drawable.brightness_auto)
         .setOngoing(true)
         .build(),
     )

app/src/main/res/drawable/brightness_auto.xml

@@ -0,0 +1,5 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android" android:height="24dp" android:tint="#000000" android:viewportHeight="24" android:viewportWidth="24" android:width="24dp">
+      
+    <path android:fillColor="@android:color/white" android:pathData="M10.85,12.65h2.3L12,9l-1.15,3.65zM20,8.69V4h-4.69L12,0.69 8.69,4H4v4.69L0.69,12 4,15.31V20h4.69L12,23.31 15.31,20H20v-4.69L23.31,12 20,8.69zM14.3,16l-0.7,-2h-3.2l-0.7,2H7.8L11,7h2l3.2,9h-1.9z"/>
+    
+</vector>