Show EOL message if update check no-ops due to unsupported Android version

app/src/main/java/eu/kanade/presentation/more/settings/screen/about/AboutScreen.kt

@@ -228,6 +228,9 @@ object AboutScreen : Screen() {
                     is GetApplicationRelease.Result.NoNewUpdate -> {
                         context.toast(R.string.update_check_no_new_updates)
                     }
+                    is GetApplicationRelease.Result.OsTooOld -> {
+                        context.toast(R.string.update_check_eol)
+                    }
                     else -> {}
                 }
             } catch (e: Exception) {

app/src/main/java/eu/kanade/tachiyomi/data/updater/AppUpdateChecker.kt

@@ -15,7 +15,7 @@ class AppUpdateChecker {
     suspend fun checkForUpdate(context: Context, forceCheck: Boolean = false): GetApplicationRelease.Result {
         // Disabling app update checks for older Android versions that we're going to drop support for
         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.P) {
-            return GetApplicationRelease.Result.NoNewUpdate
+            return GetApplicationRelease.Result.OsTooOld
         }
 
         return withIOContext {

domain/src/main/java/tachiyomi/domain/release/interactor/GetApplicationRelease.kt

@@ -87,6 +87,7 @@ class GetApplicationRelease(
     sealed interface Result {
         data class NewUpdate(val release: Release) : Result
         data object NoNewUpdate : Result
+        data object OsTooOld : Result
         data object ThirdPartyInstallation : Result
     }
 }