Define a constant Sliceable#NO_RES for no resource cases

Fix: 204733076
Test: build
Change-Id: Ifa3b9db0e915a3ec056ad68a9a1862811594d423

src/com/android/settings/biometrics/combination/BiometricSettingsAppPreferenceController.java

@@ -95,6 +95,6 @@ public class BiometricSettingsAppPreferenceController extends TogglePreferenceCo
     @Override
     public int getSliceHighlightMenuRes() {
         // not needed since it's not sliceable
-        return 0;
+        return NO_RES;
     }
 }

src/com/android/settings/biometrics/combination/BiometricSettingsKeyguardPreferenceController.java

@@ -77,6 +77,6 @@ public class BiometricSettingsKeyguardPreferenceController extends TogglePrefere
     @Override
     public int getSliceHighlightMenuRes() {
         // not needed since it's not sliceable
-        return 0;
+        return NO_RES;
     }
 }

src/com/android/settings/biometrics/face/FaceSettingsPreferenceController.java

@@ -55,6 +55,6 @@ public abstract class FaceSettingsPreferenceController extends TogglePreferenceC
     @Override
     public int getSliceHighlightMenuRes() {
         // not needed since it's not sliceable
-        return 0;
+        return NO_RES;
     }
 }

src/com/android/settings/datetime/LocationTimeZoneDetectionPreferenceController.java

@@ -120,7 +120,7 @@ public class LocationTimeZoneDetectionPreferenceController
     @Override
     public int getSliceHighlightMenuRes() {
         // not needed since it's not sliceable
-        return 0;
+        return NO_RES;
     }
 
     @Override

src/com/android/settings/emergency/EmergencyGestureSoundPreferenceController.java

@@ -55,7 +55,7 @@ public class EmergencyGestureSoundPreferenceController extends TogglePreferenceC
     @Override
     public int getSliceHighlightMenuRes() {
         // not needed since it's not sliceable
-        return 0;
+        return NO_RES;
     }
 
     @Override

src/com/android/settings/flashlight/FlashlightSlice.java

@@ -120,7 +120,7 @@ public class FlashlightSlice implements CustomSliceable {
     @Override
     public int getSliceHighlightMenuRes() {
         // no landing page in Settings
-        return 0;
+        return NO_RES;
     }
 
     private static String getCameraId(Context context) throws CameraAccessException {

src/com/android/settings/network/telephony/TelephonyTogglePreferenceController.java

@@ -68,7 +68,7 @@ public abstract class TelephonyTogglePreferenceController extends TogglePreferen
     @Override
     public int getSliceHighlightMenuRes() {
         // not needed since it's not sliceable
-        return 0;
+        return NO_RES;
     }
 
     /**

src/com/android/settings/notification/BubbleNotificationPreferenceController.java

@@ -91,7 +91,7 @@ public class BubbleNotificationPreferenceController extends
     @Override
     public int getSliceHighlightMenuRes() {
         // not needed since it's not sliceable
-        return 0;
+        return NO_RES;
     }
 
     @Override

src/com/android/settings/slices/Sliceable.java

@@ -25,6 +25,7 @@ import android.content.IntentFilter;
 import android.net.Uri;
 import android.widget.Toast;
 
+import androidx.annotation.StringRes;
 import androidx.slice.Slice;
 
 import com.android.settings.R;
@@ -135,10 +136,16 @@ public interface Sliceable {
     }
 
     /**
-     * @return a resource ID that indicates which menu entry should be highlighted in multi-pane
+     * Used to mark a {@link Sliceable} that has no highlight menu string resource.
-     * mode.
      */
-    default int getSliceHighlightMenuRes() {
+    int NO_RES = 0;
-        return 0;
+
+    /**
+     * @return a string resource declared in res/values/menu_keys.xml that indicates which menu
+     * entry should be highlighted in two-pane mode, or {@link #NO_RES} representing highlighting is
+     * not applicable.
+     */
+    @StringRes default int getSliceHighlightMenuRes() {
+        return NO_RES;
     }
 }

tests/unit/src/com/android/settings/network/ProviderModelSliceHelperTest.java

@@ -305,7 +305,7 @@ public class ProviderModelSliceHelperTest {
 
         @Override
         public int getSliceHighlightMenuRes() {
-            return 0;
+            return NO_RES;
         }
     }
 

tests/unit/src/com/android/settings/slices/SpecialCaseSliceManagerTest.java

@@ -146,7 +146,7 @@ public class SpecialCaseSliceManagerTest {
 
         @Override
         public int getSliceHighlightMenuRes() {
-            return 0;
+            return NO_RES;
         }
     }
 }