Unhide getDataRoaming, Messenger uses it to decide to download MMS or not.

bug:19015551
Change-Id: Ibcad6424695a97bd9ae123010bdf740449d09327
diff --git a/api/current.txt b/api/current.txt
index 96fccf7..3e11cda 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -28619,6 +28619,7 @@
     method public int describeContents();
     method public java.lang.CharSequence getCarrierName();
     method public java.lang.String getCountryIso();
+    method public int getDataRoaming();
     method public java.lang.CharSequence getDisplayName();
     method public java.lang.String getIccId();
     method public int getIconTint();
@@ -28641,6 +28642,8 @@
     method public java.util.List<android.telephony.SubscriptionInfo> getActiveSubscriptionInfoList();
     method public boolean isNetworkRoaming(int);
     method public void removeOnSubscriptionsChangedListener(android.telephony.SubscriptionManager.OnSubscriptionsChangedListener);
+    field public static final int DATA_ROAMING_DISABLE = 0; // 0x0
+    field public static final int DATA_ROAMING_ENABLE = 1; // 0x1
   }
 
   public static class SubscriptionManager.OnSubscriptionsChangedListener {
diff --git a/telephony/java/android/telephony/SubscriptionInfo.java b/telephony/java/android/telephony/SubscriptionInfo.java
index f3b6910..adbe1d8 100644
--- a/telephony/java/android/telephony/SubscriptionInfo.java
+++ b/telephony/java/android/telephony/SubscriptionInfo.java
@@ -254,9 +254,8 @@
     }
 
     /**
-     * @return the data roaming state for this subscription, either DATA_ROAMING_ENABLE or
-     * DATA_ROAMING_DISABLE.
-     * @hide
+     * @return the data roaming state for this subscription, either
+     * {@link SubscriptionManager#DATA_ROAMING_ENABLE} or {@link SubscriptionManager#DATA_ROAMING_DISABLE}.
      */
     public int getDataRoaming() {
         return this.mDataRoaming;
diff --git a/telephony/java/android/telephony/SubscriptionManager.java b/telephony/java/android/telephony/SubscriptionManager.java
index 9ef6f1f..c67629d 100644
--- a/telephony/java/android/telephony/SubscriptionManager.java
+++ b/telephony/java/android/telephony/SubscriptionManager.java
@@ -226,10 +226,10 @@
     /** @hide */
     public static final String DATA_ROAMING = "data_roaming";
 
-    /** @hide */
+    /** Indicates that data roaming is enabled for a subscription */
     public static final int DATA_ROAMING_ENABLE = 1;
 
-    /** @hide */
+    /** Indicates that data roaming is disabled for a subscription */
     public static final int DATA_ROAMING_DISABLE = 0;
 
     /** @hide */