Move app state banner to the very top (#8706)

This moves the banners to the root composable and so eliminates the need to
track the app states in every screen.

app/src/main/java/eu/kanade/presentation/components/TabbedScreen.kt

@@ -29,8 +29,6 @@ fun TabbedScreen(
     startIndex: Int? = null,
     searchQuery: String? = null,
     onChangeSearchQuery: (String?) -> Unit = {},
-    incognitoMode: Boolean,
-    downloadedOnlyMode: Boolean,
 ) {
     val scope = rememberCoroutineScope()
     val state = rememberPagerState()
@@ -78,8 +76,6 @@ fun TabbedScreen(
                 }
             }
 
-            AppStateBanners(downloadedOnlyMode, incognitoMode)
-
             HorizontalPager(
                 count = tabs.size,
                 modifier = Modifier.fillMaxSize(),