Change Auth mobile apps' names to "Ente Auth" (#2622)

## Description

Changed the name of the Auth mobile app to "Ente Auth" on both Android
and iOS to make it consistent with the naming of Ente Photos and to also
make it consistent on both platforms.

auth/android/app/src/main/AndroidManifest.xml

@@ -1,7 +1,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
           xmlns:tools="http://schemas.android.com/tools">
     <application android:name="${applicationName}"
-                 android:label="Auth"
+                 android:label="Ente Auth"
                  android:icon="@mipmap/launcher_icon"
                  android:usesCleartextTraffic="true"
                  android:requestLegacyExternalStorage="true"

auth/ios/Runner/Info.plist

@@ -7,7 +7,7 @@
 		<key>CFBundleDevelopmentRegion</key>
 		<string>$(DEVELOPMENT_LANGUAGE)</string>
 		<key>CFBundleDisplayName</key>
-		<string>auth</string>
+		<string>Ente Auth</string>
 		<key>CFBundleExecutable</key>
 		<string>$(EXECUTABLE_NAME)</string>
 		<key>CFBundleIdentifier</key>