Fix Const-Correctness for RIL_RadioFunctions

Re-add constant for function pointer table to
RIL_RadioFunctions. Const was accidentally removed
during a warnings cleanup.

Bug: 64231560
Test: compilation
Change-Id: I93675980c51d9162f624495d12fe3c97f1da8031
diff --git a/libril/RilSapSocket.h b/libril/RilSapSocket.h
index 1f6163e..4f6316c 100644
--- a/libril/RilSapSocket.h
+++ b/libril/RilSapSocket.h
@@ -55,7 +55,7 @@
      * Place holder for the radio functions returned by the initialization
      * function. Currenty only onRequest handler is being used.
      */
-    RIL_RadioFunctions* uimFuncs;
+    const RIL_RadioFunctions* uimFuncs;
 
     /**
      * Wrapper struct for handling the requests in the queue.
@@ -85,7 +85,7 @@
          * @param Radio functions to be used by the socket.
          */
         static void initSapSocket(const char *socketName,
-        RIL_RadioFunctions *uimFuncs);
+        const RIL_RadioFunctions *uimFuncs);
 
         /**
          * Ril envoronment variable that holds the request and
@@ -153,7 +153,7 @@
          * and add socket to the socket list.
          */
         static void addSocketToList(const char *socketName, RIL_SOCKET_ID socketid,
-        RIL_RadioFunctions *uimFuncs);
+        const RIL_RadioFunctions *uimFuncs);
 
         /**
          * Check if a socket of the given name exists in the socket list.
@@ -173,7 +173,7 @@
          */
         RilSapSocket(const char *socketName,
         RIL_SOCKET_ID socketId,
-        RIL_RadioFunctions *inputUimFuncs);
+        const RIL_RadioFunctions *inputUimFuncs);
 
         /**
          * Class method that selects the socket on which the onRequestComplete