Add TODO to default to 32-bit color at some point

Originally proposed in #8959

app/src/main/java/eu/kanade/tachiyomi/ui/reader/setting/ReaderPreferences.kt

@@ -18,6 +18,7 @@ class ReaderPreferences(
 
     fun showReadingMode() = preferenceStore.getBoolean("pref_show_reading_mode", true)
 
+    // TODO: default this to true if reader long strip ever goes stable
     fun trueColor() = preferenceStore.getBoolean("pref_true_color_key", false)
 
     fun fullscreen() = preferenceStore.getBoolean("fullscreen", true)