Improve Android read aloud TTS handling

composeApp/src/jvmMain/kotlin/net/sergeych/toread/ReadAloudPlatform.jvm.kt

@@ -7,9 +7,14 @@ actual object ReadAloudPlatform {
     actual val isSupported: Boolean = false
     private val mutableState = MutableStateFlow(ReadAloudState())
     actual val state: StateFlow<ReadAloudState> = mutableState
+    private val mutableSettingsState = MutableStateFlow(ReadAloudSettingsState())
+    actual val settingsState: StateFlow<ReadAloudSettingsState> = mutableSettingsState
 
     actual fun prepare(bookTitle: String, sentences: List<ReadAloudSentence>, startIndex: Int) = Unit
     actual fun play() = Unit
     actual fun stop() = Unit
     actual fun skip(delta: Int) = Unit
+    actual fun refreshSettings() = Unit
+    actual fun selectEngine(engineId: String?) = Unit
+    actual fun selectVoice(voiceId: String?) = Unit
 }