Rename to isTetheringFeatureEnabled

DeviceConfigUtils has isFeatureEnabled for NetworkStack and Tethering
which were confusing since the difference was only the arguments.
This CL renames isFeatureEnabled for Tethering module to
isTetheringFeatureEnabled to avoid confusion.

Bug: 279108992
Test: m
Change-Id: I05255bb38619afbe621d29524d7910d206a149f1
diff --git a/service/src/com/android/server/ConnectivityService.java b/service/src/com/android/server/ConnectivityService.java
index a29f47f..ab5024c 100755
--- a/service/src/com/android/server/ConnectivityService.java
+++ b/service/src/com/android/server/ConnectivityService.java
@@ -1413,10 +1413,10 @@
         }
 
         /**
-         * @see DeviceConfigUtils#isFeatureEnabled
+         * @see DeviceConfigUtils#isTetheringFeatureEnabled
          */
         public boolean isFeatureEnabled(Context context, String name) {
-            return DeviceConfigUtils.isFeatureEnabled(context, NAMESPACE_TETHERING, name,
+            return DeviceConfigUtils.isTetheringFeatureEnabled(context, NAMESPACE_TETHERING, name,
                     TETHERING_MODULE_NAME, false /* defaultValue */);
         }