App 2.8.2: full screen fills the space the bars leave

On the MG4 the immersive flags hid SAIC's bars but left a black band
where they had been. SYSTEM_UI_FLAG_LAYOUT_STABLE reports the bars'
insets even while they are hidden, and the fitsSystemWindows root
padded itself by them. In full screen the flag is dropped and the root
no longer fits system windows; switching full screen off restores both.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01QLJfZQZeAKAwSqViTmLzki

app/build.gradle

@@ -34,8 +34,8 @@ android {
         applicationId "com.stinnesbeck.nilsmg4"
         minSdk 27
         targetSdk 36
-        versionCode 67
-        versionName "2.8.1"
+        versionCode 68
+        versionName "2.8.2"
 
         // Nothing about the server ships in the APK: its URL and ingest token are entered in
         // the app's Server tab (ServerConfig), and the database is only reachable by the server.