Replace package with namespace (#7436)

(cherry picked from commit 5d77ee37d2e66dc39e2eee0efba90872818259d8)

app/build.gradle.kts

@@ -19,6 +19,7 @@ if (gradle.startParameter.taskRequests.toString().contains("Standard")) {
 shortcutHelper.setFilePath("./shortcuts.xml")
 
 android {
+    namespace = "eu.kanade.tachiyomi.sy"
     compileSdk = AndroidConfig.compileSdk
     ndkVersion = AndroidConfig.ndk
 

app/src/main/AndroidManifest.xml

@@ -1,6 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="eu.kanade.tachiyomi">
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
 
     <!-- Internet -->
     <uses-permission android:name="android.permission.INTERNET" />