Disable lift-to-wake when always-on is checked

The setting has little to no meaning when AOD is on.

Test: make
ROBOTEST_FILTER=AmbientDisplayAlwaysOnPreferenceControllerTest
RunSettingsRoboTests -j
Bug:62391405
Change-Id:If5492227755ca81ec0bcf921a81e2bfd33a85b9c

tests/robotests/src/com/android/internal/hardware/AmbientDisplayConfiguration.java

@@ -34,6 +34,10 @@ public class AmbientDisplayConfiguration {
         return true;
     }
 
+    public boolean pulseOnPickupCanBeModified(int user) {
+        return true;
+    }
+
     public boolean pulseOnDoubleTapAvailable() {
         return true;
     }