Rebuild Noo as a full Nextcloud client: auth, media, and Material You UI

Replaces the starter template with Login Flow v2 auth, WebDAV-backed
Files/Photos/Activity tabs, a swipeable media viewer with PDF/text/video
preview, Material You dynamic theming, a frosted-glass floating nav bar,
and a rebranded app icon/identity (com.example -> family.nasa).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

android/app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="utf-8"?>
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+  <background android:drawable="@color/ic_launcher_background"/>
+  <foreground>
+      <inset
+          android:drawable="@drawable/ic_launcher_foreground"
+          android:inset="16%" />
+  </foreground>
+</adaptive-icon>