Add RIL_UNSOL_KEEPALIVE_STATUS in ril_unsol_commands.h

Bug: 134048171
Test: 1. Build Pass
      2. Running atest android.net.cts.ConnectivityManagerTest
         #testSocketKeepaliveLimitTelephony and make sure the
         Telephony FWK can receive RIL_UNSOL_KEEPALIVE_STATUS.

Change-Id: I98f8d4a95a6c9c3c078a02aa9fd8722779623f12
diff --git a/libril/ril_unsol_commands.h b/libril/ril_unsol_commands.h
index bd2cf70..831f5fb 100644
--- a/libril/ril_unsol_commands.h
+++ b/libril/ril_unsol_commands.h
@@ -64,3 +64,4 @@
     {RIL_UNSOL_MODEM_RESTART, radio::modemResetInd, WAKE_PARTIAL},
     {RIL_UNSOL_CARRIER_INFO_IMSI_ENCRYPTION, radio::carrierInfoForImsiEncryption, WAKE_PARTIAL},
     {RIL_UNSOL_NETWORK_SCAN_RESULT, radio::networkScanResultInd, WAKE_PARTIAL},
+    {RIL_UNSOL_KEEPALIVE_STATUS, radio::keepaliveStatusInd, WAKE_PARTIAL},