Fix black-on-black status bars with hidden media

In dark mode, the ElementTheme composable incorrectly applied a dark
colour to the status bars, which was nearly invisible on top of the
black background of the app.

Signed-off-by: Joe Groocock <me@frebib.net>

features/messages/impl/src/main/kotlin/io/element/android/features/messages/impl/timeline/protection/ProtectedView.kt

@@ -46,7 +46,7 @@ fun ProtectedView(
                 .background(Color(0x99000000)),
             contentAlignment = Alignment.Center,
         ) {
-            ElementTheme(darkTheme = false) {
+            ElementTheme(darkTheme = false, applySystemBarsUpdate = false) {
                 // Not using a button to be able to have correct size
                 Text(
                     modifier = Modifier