Convert empty response to -1 for some SIM APIs

Convert empty response to -1 for some SIM APIs

Earlier RILs did not send a response for some cases although the
interface expected an integer as response. Do not return error if
response is empty. Instead Return -1 in those cases to maintain backward
compatibility.

Bug: 36209518
Test: Enable fixed dialing number and call barring by dialing *35*PASSWORD#.
      Check logs to make sure RILC does not fail with invalid response
      on devices where RIL doesn't send a response to these requests
      on success.

Change-Id: I1d91bacd60bd19985710a111de57e86f03e6ce4a