Unhide getOrCreateThreadId

Part 2/2 of exposing getOrCreateThreadId. Add to
current.txt and system-current.txt.

Bug: 18777272
Change-Id: Id3bb1e3f73c4826154096057a778ac97ee86abc6
diff --git a/api/current.txt b/api/current.txt
index f5ea6c9..722143c 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -26134,6 +26134,8 @@
   }
 
   public static final class Telephony.Threads implements android.provider.Telephony.ThreadsColumns {
+    method public static long getOrCreateThreadId(android.content.Context, java.lang.String);
+    method public static long getOrCreateThreadId(android.content.Context, java.util.Set<java.lang.String>);
     field public static final int BROADCAST_THREAD = 1; // 0x1
     field public static final int COMMON_THREAD = 0; // 0x0
     field public static final android.net.Uri CONTENT_URI;
diff --git a/api/system-current.txt b/api/system-current.txt
index 37b8021..9c56abc 100644
--- a/api/system-current.txt
+++ b/api/system-current.txt
@@ -27723,6 +27723,8 @@
   }
 
   public static final class Telephony.Threads implements android.provider.Telephony.ThreadsColumns {
+    method public static long getOrCreateThreadId(android.content.Context, java.lang.String);
+    method public static long getOrCreateThreadId(android.content.Context, java.util.Set<java.lang.String>);
     field public static final int BROADCAST_THREAD = 1; // 0x1
     field public static final int COMMON_THREAD = 0; // 0x0
     field public static final android.net.Uri CONTENT_URI;