Change package name

So that in case the user had ntfy already installed, we don't
override it. Indeed, the Ntfy icon (which is actually a BlissLauncher3 cache)
would appear after the OTA and the user would not be able to remove it
without cleaning BlissLauncher3 cache.

app/build.gradle

@@ -10,7 +10,7 @@ android {
     compileSdkVersion 33
 
     defaultConfig {
-        applicationId "io.heckel.ntfy"
+        applicationId "foundation.e.ntfy"
         minSdkVersion 23
         targetSdkVersion 33
 
@@ -68,6 +68,7 @@ android {
             '-Xjvm-default=all-compatibility' // https://stackoverflow.com/a/71234042/1440785
         ]
     }
+    namespace "io.heckel.ntfy"
 }
 
 // Disables GoogleServices tasks for F-Droid variant

app/src/main/AndroidManifest.xml

@@ -1,7 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:tools="http://schemas.android.com/tools"
-    package="io.heckel.ntfy">
+    xmlns:tools="http://schemas.android.com/tools">
 
     <!-- Permissions -->
     <uses-permission android:name="android.permission.INTERNET"/>