Deprecated the old Material Design 2 theme to avoid using it (#6815)

* Deprecated the old Material Design 2 theme to avoid using it

* Remove Autofix

Author: TimoPtr

app/src/main/kotlin/io/homeassistant/companion/android/util/compose/Theme.kt

@@ -50,6 +50,9 @@ private val haDarkColors = darkColors(
  * A Compose [MaterialTheme] version of the app's XML theme. This achieves the same goal as the
  * (now deprecated) [com.google.accompanist.themeadapter.material.MdcTheme].
  */
+@Deprecated(
+    "Uses Material Design 2. Use HATheme (Material Design 3) instead. Kept until remaining call sites are migrated.",
+)
 @Composable
 fun HomeAssistantAppTheme(content: @Composable () -> Unit) {
     MaterialTheme(