Add new AdapterTypes to android sdk

This patch adds the the new adapter type enums
that has been added in the c++ api,
https://webrtc-review.googlesource.com/c/src/+/172582

BUG: webrtc:11473
Change-Id: I68aab58b2f0ab6cb6e262869902d5aecf6b36d8c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/172764
Reviewed-by: Sami Kalliomäki <sakal@webrtc.org>
Commit-Queue: Jonas Oreland <jonaso@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#30991}

sdk/android/api/org/webrtc/PeerConnection.java

@@ -382,7 +382,11 @@ public class PeerConnection {
     CELLULAR(1 << 2),
     VPN(1 << 3),
     LOOPBACK(1 << 4),
-    ADAPTER_TYPE_ANY(1 << 5);
+    ADAPTER_TYPE_ANY(1 << 5),
+    CELLULAR_2G(1 << 6),
+    CELLULAR_3G(1 << 7),
+    CELLULAR_4G(1 << 8),
+    CELLULAR_5G(1 << 9);
 
     public final Integer bitMask;
     private AdapterType(Integer bitMask) {