Remove WebView fallback package handling.

There is no longer a special "fallback package" state for WebView that
means it should not be able to have its enabled/disabled state
controlled by the user. Remove the code used to implement this in
Settings.

Bug: 129470358
Test: verify that WebView's enable/disable button is not greyed out
Change-Id: Ifc0921511a71282a77f239e5ff5955e60fab6e2c

src/com/android/settings/applications/appinfo/AppButtonsPreferenceController.java

@@ -33,13 +33,10 @@ import android.content.res.Resources;
 import android.net.Uri;
 import android.os.AsyncTask;
 import android.os.Bundle;
-import android.os.RemoteException;
-import android.os.ServiceManager;
 import android.os.UserHandle;
 import android.os.UserManager;
 import android.util.Log;
 import android.view.View;
-import android.webkit.IWebViewUpdateService;
 
 import androidx.annotation.VisibleForTesting;
 import androidx.fragment.app.Fragment;
@@ -438,10 +435,6 @@ public class AppButtonsPreferenceController extends BasePreferenceController imp
             enabled = false;
         }
 
-        if (isFallbackPackage(mAppEntry.info.packageName)) {
-            enabled = false;
-        }
-
         mButtonsPref.setButton2Enabled(enabled);
     }
 
@@ -466,22 +459,6 @@ public class AppButtonsPreferenceController extends BasePreferenceController imp
         }
     }
 
-    @VisibleForTesting
-    boolean isFallbackPackage(String packageName) {
-        try {
-            IWebViewUpdateService webviewUpdateService =
-                    IWebViewUpdateService.Stub.asInterface(
-                            ServiceManager.getService("webviewupdate"));
-            if (webviewUpdateService.isFallbackPackage(packageName)) {
-                return true;
-            }
-        } catch (RemoteException e) {
-            throw new RuntimeException(e);
-        }
-
-        return false;
-    }
-
     @VisibleForTesting
     void updateForceStopButton() {
         if (mDpm.packageHasActiveAdmins(mPackageInfo.packageName)) {