Allow TetherService to take a callback to receiver provision results.

See ag/850685 for corresponding framework changes. This is being done
as part of exposing a cleaner tethering API which will be used by
Quick Settings and Settings.

BUG: 26247383
Change-Id: I061b8b8b2b0c5bbe98f50deb051e2bfb8e773d61
diff --git a/src/com/android/settings/TetherSettings.java b/src/com/android/settings/TetherSettings.java
index ee8900e..4b5f23d 100644
--- a/src/com/android/settings/TetherSettings.java
+++ b/src/com/android/settings/TetherSettings.java
@@ -47,10 +47,10 @@
 import java.util.ArrayList;
 import java.util.concurrent.atomic.AtomicReference;
 
-import static com.android.settingslib.TetherUtil.TETHERING_BLUETOOTH;
-import static com.android.settingslib.TetherUtil.TETHERING_INVALID;
-import static com.android.settingslib.TetherUtil.TETHERING_USB;
-import static com.android.settingslib.TetherUtil.TETHERING_WIFI;
+import static android.net.ConnectivityManager.TETHERING_BLUETOOTH;
+import static android.net.ConnectivityManager.TETHERING_INVALID;
+import static android.net.ConnectivityManager.TETHERING_USB;
+import static android.net.ConnectivityManager.TETHERING_WIFI;
 
 /*
  * Displays preferences for Tethering.