Relace BuildCompat.isAtLeastS to check Build.VERSION.SDK_INT

Fixes: 191227729
Test: robotest & manual
Change-Id: I4b865b7de33a6801783dd645213fef0cda8d4dd2
diff --git a/packages/SettingsLib/MainSwitchPreference/Android.bp b/packages/SettingsLib/MainSwitchPreference/Android.bp
index 23ee49e..76d1ea7 100644
--- a/packages/SettingsLib/MainSwitchPreference/Android.bp
+++ b/packages/SettingsLib/MainSwitchPreference/Android.bp
@@ -16,8 +16,9 @@
     static_libs: [
         "androidx.preference_preference",
         "SettingsLibSettingsTheme",
+        "SettingsLibUtils",
     ],
 
     sdk_version: "system_current",
-    min_sdk_version: "21",
+    min_sdk_version: "28",
 }