keymaster: send back algorithm & key_bits to HAL

The HAL may buffer data for better performance;
send back the algorithm and key size so that the
HAL can determine appropriate buffer sizes.

Change-Id: Ia8052fcef1973575c52c4fe3bf59e2b3eaae4777
diff --git a/nugget/proto/nugget/app/keymaster/keymaster.proto b/nugget/proto/nugget/app/keymaster/keymaster.proto
index 47a7d60..9559106 100644
--- a/nugget/proto/nugget/app/keymaster/keymaster.proto
+++ b/nugget/proto/nugget/app/keymaster/keymaster.proto
@@ -218,6 +218,8 @@
   ErrorCode error_code = 1;
   KeyParameters params = 2;
   OperationHandle handle = 3;
+  Algorithm algorithm = 4;
+  uint32 key_bits = 5;
 }
 
 // UpdateOperation