Add 'Erase SIM' to mobile network details page

This adds a preference to the mobile network details page that lets a
user delete an eSIM profile.

Bug: 124254555
Test: make RunSettingsRoboTests
Change-Id: I1e266566afc36ff39bf1b1c6d1db674c7c6e8648

src/com/android/settings/network/telephony/DeleteSimProfilePreferenceController.java

@@ -0,0 +1,74 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.settings.network.telephony;
+
+import android.content.Context;
+import android.telephony.SubscriptionInfo;
+
+import androidx.fragment.app.Fragment;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceScreen;
+
+import com.android.settings.core.BasePreferenceController;
+import com.android.settings.network.SubscriptionUtil;
+
+/** This controls a preference allowing the user to delete the profile for an eSIM. */
+public class DeleteSimProfilePreferenceController extends BasePreferenceController {
+
+    private SubscriptionInfo mSubscriptionInfo;
+    private Fragment mParentFragment;
+
+    public DeleteSimProfilePreferenceController(Context context, String preferenceKey) {
+        super(context, preferenceKey);
+    }
+
+    public void init(int subscriptionId, Fragment parentFragment) {
+        mParentFragment = parentFragment;
+
+        for (SubscriptionInfo info : SubscriptionUtil.getAvailableSubscriptions(
+                mContext)) {
+            if (info.getSubscriptionId() == subscriptionId && info.isEmbedded()) {
+                mSubscriptionInfo = info;
+                break;
+            }
+        }
+    }
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        final Preference pref = screen.findPreference(getPreferenceKey());
+        pref.setOnPreferenceClickListener(p -> {
+            final DeleteSimProfileConfirmationDialog dialogFragment =
+                    DeleteSimProfileConfirmationDialog.newInstance(mSubscriptionInfo);
+            dialogFragment.setTargetFragment(mParentFragment, 0);
+            dialogFragment.show(mParentFragment.getFragmentManager(),
+                    DeleteSimProfileConfirmationDialog.TAG);
+            return true;
+        });
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        if (mSubscriptionInfo != null) {
+            return AVAILABLE;
+        } else {
+            return CONDITIONALLY_UNAVAILABLE;
+        }
+    }
+
+}