Fix EthernetManager.addListener dependency in Tethering settings.

Ethernet service related files are going to be moved into Connectivity
module. EthernetManager.addListener(listener, exectuor) will be exposed
out as module-lib API. Replace the current API usage with the one to be
exposed.

android.os.HandlerExecutor is a hidden API which isn't visible to modules,
try to replace HanlderExecutor class with Handler.post itself although
Setttings can still access this API.

Bug: 210586283
Test: m
Change-Id: I618b43769c68897f4724fae8213181be1cc770c6
diff --git a/src/com/android/settings/TetherSettings.java b/src/com/android/settings/TetherSettings.java
index 1a21b55..e485d1e 100644
--- a/src/com/android/settings/TetherSettings.java
+++ b/src/com/android/settings/TetherSettings.java
@@ -39,7 +39,6 @@
 import android.os.Bundle;
 import android.os.Environment;
 import android.os.Handler;
-import android.os.HandlerExecutor;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.provider.SearchIndexableResource;
@@ -324,14 +323,14 @@
 
         mStartTetheringCallback = new OnStartTetheringCallback(this);
         mTetheringEventCallback = new TetheringEventCallback();
-        mTm.registerTetheringEventCallback(new HandlerExecutor(mHandler), mTetheringEventCallback);
+        mTm.registerTetheringEventCallback(r -> mHandler.post(r), mTetheringEventCallback);
 
         mMassStorageActive = Environment.MEDIA_SHARED.equals(Environment.getExternalStorageState());
         registerReceiver();
 
         mEthernetListener = new EthernetListener();
         if (mEm != null)
-            mEm.addListener(mEthernetListener);
+            mEm.addListener(mEthernetListener, r -> mHandler.post(r));
 
         updateUsbState();
         updateBluetoothAndEthernetState();