Add default IME to Privacy Settings page

This CL adds information about default IMEs set by Device Owner and/or
Profile Owners to the Enterprise Privacy Setting page.

Test: make RunSettingsRoboTests
Bug: 32692748

Change-Id: I9f78ab4792a5a1d444808048ff33e3e20a0483dc

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

@@ -17,6 +17,7 @@
 package com.android.settings.enterprise;
 
 import android.content.ComponentName;
+import android.os.UserHandle;
 import android.support.annotation.Nullable;
 
 /**
@@ -89,4 +90,11 @@ public interface DevicePolicyManagerWrapper {
      * @see android.app.admin.DevicePolicyManager#getLastNetworkLogRetrievalTime
      */
     long getLastNetworkLogRetrievalTime();
+
+    /**
+     * Calls {@code DevicePolicyManager.isCurrentInputMethodSetByOwner()}.
+     *
+     * @see android.app.admin.DevicePolicyManager#isCurrentInputMethodSetByOwner
+     */
+    boolean isCurrentInputMethodSetByOwner();
 }