fix: update package name in AndroidManifest and correct library name in build.gradle.kts

Author: demolaf

auth/build.gradle.kts

@@ -13,7 +13,7 @@ android {
         minSdk = Config.SdkVersions.min
         targetSdk = Config.SdkVersions.target
 
-        buildConfigField("String", "LIBRARY_NAME", "\"Firebase-UI-Android\"")
+        buildConfigField("String", "LIBRARY_NAME", "\"firebase-ui-android\"")
         buildConfigField("String", "VERSION_NAME", "\"${Config.version}\"")
 
         resourcePrefix("fui_")

auth/src/main/AndroidManifest.xml

@@ -1,6 +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">
+    xmlns:tools="http://schemas.android.com/tools" package="com.firebase.ui.auth">
 
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.INTERNET" />