Gray out the "Remove account" button when there's a restriction

Fix: 243011338
Fix: 288887119
Test: robotest, manual
Change-Id: Ie3d6607f69a5e7c66bb750febc4d526d6d209ac6

src/com/android/settings/widget/RestrictedButton.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2023 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.widget;
+
+import android.content.Context;
+import android.os.UserHandle;
+import android.util.AttributeSet;
+import android.widget.Button;
+
+import com.android.settingslib.RestrictedLockUtils;
+import com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
+import com.android.settingslib.RestrictedLockUtilsInternal;
+
+/**
+ * A preference with a plus button on the side representing an "add" action. The plus button will
+ * only be visible when a non-null click listener is registered.
+ */
+public class RestrictedButton extends Button {
+
+    private UserHandle mUserHandle;
+    private String mUserRestriction;
+
+    public RestrictedButton(Context context) {
+        super(context);
+    }
+
+    public RestrictedButton(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+
+    public RestrictedButton(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+
+    public RestrictedButton(Context context, AttributeSet attrs, int defStyleAttr,
+            int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+
+    @Override
+    public boolean performClick() {
+        EnforcedAdmin admin = getEnforcedAdmin();
+        if (admin != null) {
+            RestrictedLockUtils.sendShowAdminSupportDetailsIntent(mContext, admin);
+            return false;
+        }
+        return super.performClick();
+    }
+
+    /** Initialize the button with {@link UserHandle} and a restriction */
+    public void init(UserHandle userHandle, String restriction) {
+        setAllowClickWhenDisabled(true);
+        mUserHandle = userHandle;
+        mUserRestriction = restriction;
+    }
+
+    /** Update the restriction state */
+    public void updateState() {
+        setEnabled(getEnforcedAdmin() == null);
+    }
+
+    private EnforcedAdmin getEnforcedAdmin() {
+        if (mUserHandle != null) {
+            EnforcedAdmin admin = RestrictedLockUtilsInternal.checkIfRestrictionEnforced(
+                    mContext, mUserRestriction, mUserHandle.getIdentifier());
+            if (admin != null) {
+                return admin;
+            }
+        }
+        return null;
+    }
+}