Add Device Owner disclosure to Add Accounts dialog

This CL adds a footer to the Add Accounts dialog that tells the user
when the device is managed by a Device Owner app.

Bug: 32692748
Test: make RunSettingsRoboTests

Change-Id: I0dd161eb0bbbc87c04692d4fa6547bd41dab05e0

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

@@ -33,6 +33,13 @@ public interface DevicePolicyManagerWrapper {
      */
     ComponentName getDeviceOwnerComponentOnAnyUser();
 
+    /**
+     * Calls {@code DevicePolicyManager.getDeviceOwnerNameOnAnyUser()}.
+     *
+     * @see android.app.admin.DevicePolicyManager#getDeviceOwnerNameOnAnyUser
+     */
+    public CharSequence getDeviceOwnerOrganizationName();
+
     /**
      * Calls {@code DevicePolicyManager.getPermissionGrantState()}.
      *