Rename Android shell display name to Hesychia (#29)

Capacitor appName and Android string resources (plus docs) now show Hesychia
so the mobile shell matches the product rebrand when this wrap lands.

llm-fe/android/app/src/main/res/values/strings.xml

@@ -1,7 +1,7 @@
 <?xml version='1.0' encoding='utf-8'?>
 <resources>
-    <string name="app_name">AI ML Chat</string>
-    <string name="title_activity_main">AI ML Chat</string>
+    <string name="app_name">Hesychia</string>
+    <string name="title_activity_main">Hesychia</string>
     <string name="package_name">com.aimloperations.chat</string>
     <string name="custom_url_scheme">com.aimloperations.chat</string>
 </resources>