Refactor HandlerInjector to SettingsLib

- Plan to share the HandlerInjector class to System UI.

Bug: 194186477
Test: manual test
atest InternetResetHelperTest

Change-Id: I4b1b72ac7742bcfdd89ae61d9f88df1c64224f1f

src/com/android/settings/network/InternetResetHelper.java

@@ -21,7 +21,6 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.net.wifi.WifiManager;
-import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.Process;
 import android.text.TextUtils;
@@ -37,6 +36,7 @@ import androidx.preference.Preference;
 import androidx.preference.PreferenceCategory;
 
 import com.android.settingslib.connectivity.ConnectivitySubsystemsRecoveryManager;
+import com.android.settingslib.utils.HandlerInjector;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -86,7 +86,7 @@ public class InternetResetHelper implements LifecycleObserver,
 
     public InternetResetHelper(Context context, Lifecycle lifecycle) {
         mContext = context;
-        mHandlerInjector = new HandlerInjector(context);
+        mHandlerInjector = new HandlerInjector(context.getMainThreadHandler());
         mWifiManager = mContext.getSystemService(WifiManager.class);
         mWifiStateFilter = new IntentFilter(WifiManager.NETWORK_STATE_CHANGED_ACTION);
 
@@ -239,24 +239,4 @@ public class InternetResetHelper implements LifecycleObserver,
         mHandlerInjector.postDelayed(mTimeoutRunnable, RESTART_TIMEOUT_MS);
         mConnectivitySubsystemsRecoveryManager.triggerSubsystemRestart(null /* reason */, this);
     }
-
-    /**
-     * Wrapper for testing compatibility.
-     */
-    @VisibleForTesting
-    static class HandlerInjector {
-        protected final Handler mHandler;
-
-        HandlerInjector(Context context) {
-            mHandler = context.getMainThreadHandler();
-        }
-
-        public void postDelayed(Runnable runnable, long delayMillis) {
-            mHandler.postDelayed(runnable, delayMillis);
-        }
-
-        public void removeCallbacks(Runnable runnable) {
-            mHandler.removeCallbacks(runnable);
-        }
-    }
 }