Update language to comply with Android's inclusive language guidance

See https://source.android.com/setup/contribute/respectful-code for reference

Bug: 161896447
Test: robotest & manual
Change-Id: Ibe64a68d7bddf84780dfac33555c097ff55c97a8

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

@@ -426,7 +426,7 @@ public class SettingsSliceProvider extends SliceProvider {
         try {
             KEY_VALUE_LIST_PARSER.setString(value);
         } catch (IllegalArgumentException e) {
-            Log.e(TAG, "Bad Settings Slices Whitelist flags", e);
+            Log.e(TAG, "Bad Settings Slices Allowlist flags", e);
             return set;
         }