When Remove Account is disallowed, show dialog

When DISALLOW_MODIFY_ACCOUNT is set by a device admin, and
the user wants to remove an account, show the support dialog
instead of showing the confirm dialog.

To use the O-API DPM.createAdminSupportIntent(), a wrapper
needs to be used, because existing Robolectric tests otherwise
don't compile.

Bug: 37413849
Test: make RunSettingsRoboTests -j40 ROBOTEST_FILTER=*RemoveAccountPreferenceControllerTest

Change-Id: If23ea304ab8b9df1748e6acf3032310843b04780

src/com/android/settings/enterprise/DevicePolicyManagerWrapper.java

@@ -18,6 +18,7 @@ package com.android.settings.enterprise;
 
 import android.annotation.NonNull;
 import android.content.ComponentName;
+import android.content.Intent;
 import android.os.UserHandle;
 import android.support.annotation.Nullable;
 
@@ -143,4 +144,11 @@ public interface DevicePolicyManagerWrapper {
      * @see android.app.admin.DevicePolicyManager#isUninstallInQueue
      */
     boolean isUninstallInQueue(String packageName);
+
+    /**
+     * Calls {@code DevicePolicyManager.createAdminSupportIntent()}.
+     *
+     * @see android.app.admin.DevicePolicyManager#createAdminSupportIntent
+     */
+    Intent createAdminSupportIntent(String restriction);
 }

src/com/android/settings/enterprise/DevicePolicyManagerWrapperImpl.java

@@ -19,6 +19,7 @@ package com.android.settings.enterprise;
 import android.annotation.NonNull;
 import android.app.admin.DevicePolicyManager;
 import android.content.ComponentName;
+import android.content.Intent;
 import android.os.UserHandle;
 import android.support.annotation.Nullable;
 
@@ -111,4 +112,9 @@ public class DevicePolicyManagerWrapperImpl implements DevicePolicyManagerWrappe
     public boolean isUninstallInQueue(String packageName) {
         return mDpm.isUninstallInQueue(packageName);
     }
+
+    @Override
+    public Intent createAdminSupportIntent(@NonNull String restriction) {
+        return mDpm.createAdminSupportIntent(restriction);
+    }
 }