Credential management app UI tweaks

Credential management app Settings screen
* Add uninstall certificates button
* Reformat summary
* Remove dividing lines
Request manage credentials screen
* Make requesting app name bold

Manual testing
* Install TestDPC and select 'Request to
  manage credentials'
* Verify app name is bold and select allow
* Install a certificate as the cred mng app
  via TestDPC
* Go to Setting > Security > Encryption
  & Credentials > Credential Management App
* Verify screen looks like mocks
* Select 'Remove certificates' and
  verify all certificates installed by the
  cred mng app are removed
Settings screen: https://screenshot.googleplex.com/C6n9bnwkw843jgf
Request screen: https://screenshot.googleplex.com/5qH44NXKKGRsdHs

Bug: 189416800
Test: manual testing
      CredentialManagementAppControllerTest
      CredentialManagementAppFragmentTest
      CredentialManagementAppButtonsControllerTest
      CredentialManagementAppHeaderControllerTest
      RequestManageCredentialsTest
Change-Id: I71334b231ae7cefbc055e2575eda5418da2548b4

res/drawable/ic_upload.xml

@@ -0,0 +1,25 @@
+<!--
+  ~ Copyright (C) 2021 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.
+  -->
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24.0dp"
+    android:height="24.0dp"
+    android:tint="?android:attr/colorControlNormal"
+    android:viewportHeight="24.0"
+    android:viewportWidth="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M18,15v3H6v-3H4v3c0,1.1,0.9,2,2,2h12c1.1,0,2-0.9,2-2v-3H18z M7,9l1.41,1.41L11,7.83V16h2V7.83l2.59,2.58L17,9l-5-5L7,9z" />
+</vector>

res/values/strings.xml

@@ -6784,9 +6784,9 @@
     <string name="cert_not_installed">Certificate not installed</string>
 
     <!-- Title of screen shown to the user when an app requests to manage the user's KeyChain credentials [CHAR LIMIT=NONE] -->
-    <string name="request_manage_credentials_title">Allow <xliff:g id="app_name" example="Ping">%s</xliff:g> to install certificates on this device?</string>
+    <string name="request_manage_credentials_title">Allow <b><xliff:g id="app_name" example="Ping">^1</xliff:g></b> to install certificates on this device?</string>
     <!-- Description of screen shown to the user when an app requests to manage the user's KeyChain credentials [CHAR LIMIT=NONE] -->
-    <string name="request_manage_credentials_description">These certificates will identify you to the apps and URLs below</string>
+    <string name="request_manage_credentials_description">These certificates will verify you by sharing your device\u2019s unique ID with the apps and URLs below</string>
     <!-- Label for button to not allow an app to manage the user's KeyChain credentials [CHAR_LIMIT=50] -->
     <string name="request_manage_credentials_dont_allow">Don\u2019t allow</string>
     <!-- Label for button to allow an app to manage the user's KeyChain credentials [CHAR_LIMIT=50] -->
@@ -6798,7 +6798,9 @@
     <!-- Summary if there is no certificate management app [CHAR_LIMIT=NONE] -->
     <string name="no_certificate_management_app">None</string>
     <!-- Summary of preference if there is a certificate management app [CHAR LIMIT=NONE] -->
-    <string name="certificate_management_app_description">Certificates installed by this app identify you to the apps and URLs below</string>
+    <string name="certificate_management_app_description">Certificates will verify you when you use the apps and URLs below</string>
+    <!-- Label for button to uninstall all certificates installed by the credential management app [CHAR LIMIT=30] -->
+    <string name="uninstall_certs_credential_management_app">Uninstall certificates</string>
     <!-- Label for button to remove the credential management app [CHAR LIMIT=30] -->
     <string name="remove_credential_management_app">Remove</string>
     <!-- List item found in the credential management app's authentication policy [CHAR LIMIT=NONE] -->

res/values/styles.xml

@@ -835,6 +835,7 @@
         <item name="android:layout_marginTop">24dp</item>
         <item name="android:textSize">18sp</item>
         <item name="android:textColor">?android:attr/textColorPrimary</item>
+        <item name="android:alpha">0.7</item>
     </style>
 
     <style name="AppAuthenticationPolicyItem">

res/xml/credential_management_app_fragment.xml

@@ -27,19 +27,11 @@
         android:order="-10000"
         settings:controller="com.android.settings.security.CredentialManagementAppHeaderController"/>
 
-    <com.android.settingslib.widget.TopIntroPreference
-        android:key="top_intro_request_manage_credentials"
-        android:order="-9999"
-        android:title="@string/request_manage_credentials_description"
-        settings:searchable="false"/>
-
     <!-- Buttons -->
     <com.android.settingslib.widget.ActionButtonsPreference
         android:key="buttons"
         android:selectable="true"
         android:order="-9998"
-        settings:allowDividerAbove="true"
-        settings:allowDividerBelow="true"
         settings:controller="com.android.settings.security.CredentialManagementAppButtonsController"/>
 
     <!-- Authentication Policy -->
@@ -47,7 +39,6 @@
         android:key="authentication_policy"
         android:layout="@layout/preference_category_no_label"
         android:title="@string/summary_placeholder"
-        settings:allowDividerAbove="true"
         settings:controller="com.android.settings.security.CredentialManagementAppPolicyController"/>
 
 </PreferenceScreen>

src/com/android/settings/security/CredentialManagementAppAdapter.java

@@ -21,6 +21,7 @@ import android.content.pm.ApplicationInfo;
 import android.content.pm.PackageManager;
 import android.net.Uri;
 import android.security.AppUriAuthenticationPolicy;
+import android.text.TextUtils;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -85,11 +86,13 @@ public class CredentialManagementAppAdapter extends RecyclerView.Adapter<Recycle
                 ApplicationInfo applicationInfo =
                         mPackageManager.getApplicationInfo(mCredentialManagerPackage, 0);
                 mAppIconView.setImageDrawable(mPackageManager.getApplicationIcon(applicationInfo));
-                mTitleView.setText(mContext.getString(R.string.request_manage_credentials_title,
+                mTitleView.setText(TextUtils.expandTemplate(
+                        mContext.getText(R.string.request_manage_credentials_title),
                         applicationInfo.loadLabel(mPackageManager)));
             } catch (PackageManager.NameNotFoundException e) {
                 mAppIconView.setImageDrawable(null);
-                mTitleView.setText(mContext.getString(R.string.request_manage_credentials_title,
+                mTitleView.setText(TextUtils.expandTemplate(
+                        mContext.getText(R.string.request_manage_credentials_title),
                         mCredentialManagerPackage));
             }
         }

src/com/android/settings/security/CredentialManagementAppButtonsController.java

@@ -80,12 +80,29 @@ public class CredentialManagementAppButtonsController extends BasePreferenceCont
     private void displayButtons(PreferenceScreen screen) {
         if (mHasCredentialManagerPackage) {
             ((ActionButtonsPreference) screen.findPreference(getPreferenceKey()))
-                    .setButton1Text(R.string.remove_credential_management_app)
+                    .setButton1Text(R.string.uninstall_certs_credential_management_app)
-                    .setButton1Icon(R.drawable.ic_undo_24)
+                    .setButton1Icon(R.drawable.ic_upload)
-                    .setButton1OnClickListener(view -> removeCredentialManagementApp());
+                    .setButton1OnClickListener(view -> uninstallCertificates())
+                    .setButton2Text(R.string.remove_credential_management_app)
+                    .setButton2Icon(R.drawable.ic_delete)
+                    .setButton2OnClickListener(view -> removeCredentialManagementApp());
         }
     }
 
+    private void uninstallCertificates() {
+        mExecutor.execute(() -> {
+            try {
+                IKeyChainService service = KeyChain.bind(mContext).getService();
+                for (String existingAlias :
+                        service.getCredentialManagementAppPolicy().getAliases()) {
+                    service.removeKeyPair(existingAlias);
+                }
+            } catch (InterruptedException | RemoteException e) {
+                Log.e(TAG, "Unable to uninstall certificates");
+            }
+        });
+    }
+
     private void removeCredentialManagementApp() {
         mExecutor.execute(() -> {
             try {

src/com/android/settings/security/CredentialManagementAppHeaderController.java

@@ -83,7 +83,6 @@ public class CredentialManagementAppHeaderController extends BasePreferenceContr
         TextView titleView = headerPref.findViewById(R.id.entity_header_title);
         TextView summary1 = headerPref.findViewById(R.id.entity_header_summary);
         TextView summary2 = headerPref.findViewById(R.id.entity_header_second_summary);
-        summary1.setVisibility(View.GONE);
         summary2.setVisibility(View.GONE);
 
         try {
@@ -91,6 +90,7 @@ public class CredentialManagementAppHeaderController extends BasePreferenceContr
                     mPackageManager.getApplicationInfo(mCredentialManagerPackageName, 0);
             appIconView.setImageDrawable(mPackageManager.getApplicationIcon(applicationInfo));
             titleView.setText(applicationInfo.loadLabel(mPackageManager));
+            summary1.setText(R.string.certificate_management_app_description);
         } catch (PackageManager.NameNotFoundException e) {
             appIconView.setImageDrawable(null);
             titleView.setText(mCredentialManagerPackageName);