Fix ContextualAdaptiveSleepSliceTest

ADAPTIVE_SLEEP has been moved from Settings.System to Settings.Secure
but the main logic hasn't synced with the change which leads to the
failure.

Fixes: 139319542
Test: robotests
Change-Id: I56f58cc3da5a4034e2bf2ed5a63ae3bc2fec2a21

src/com/android/settings/homepage/contextualcards/slices/ContextualAdaptiveSleepSlice.java

@@ -129,7 +129,7 @@ public class ContextualAdaptiveSleepSlice implements CustomSliceable {
      * @return {@code true} if the feature is turned on for the device, otherwise {@code false}
      */
     private boolean isTurnedOn() {
-        return Settings.System.getInt(
+        return Settings.Secure.getInt(
                 mContext.getContentResolver(), Settings.Secure.ADAPTIVE_SLEEP, 0) != 0;
     }