Rename to isTetheringFeatureNotChickenedOut

Original name was isTetheringFeatureForceDisabled but it's expected that
the caller of this method will use as `enabled =
!isTetheringFeatureForceDisabled` which is error prune.
So aosp/2711138 renames to isTetheringFeatureNotChickenedOut and updates to
return true if the feature is not disabled.

Bug: 279108992
Test: m
Change-Id: Ia992113e9fb1aee09fcfe48e2b39ca03876063ee

service/src/com/android/server/connectivity/KeepaliveTracker.java

@@ -993,7 +993,7 @@ public class KeepaliveTracker {
          */
         public boolean isAddressTranslationEnabled(@NonNull Context context) {
             return DeviceConfigUtils.isFeatureSupported(context, FEATURE_CLAT_ADDRESS_TRANSLATE)
-                    && !DeviceConfigUtils.isTetheringFeatureForceDisabled(
+                    && DeviceConfigUtils.isTetheringFeatureNotChickenedOut(
                             CONFIG_DISABLE_CLAT_ADDRESS_TRANSLATE);
         }
     }