ril: Fix telephony under emulation.

ril: Fix telephony under emulation.

This patch fixes several regressions that were introduced in
a recent rewrite of the native RIL support code, and which
prevent networking from working under emulation.

- 'apn' and 'type' were incorrectly swapped in the
   AT+CGDCONT= command string, so the command was
   never executed properly by the emulated modem.

- The PDP context type was not properly written to the
  parcel in responseDataCallList() in libril/ril.cpp.
  Due to this the Java RIL code ignored the response.

- The dns list returned by requestOrSendDataCallList()
  was an empty string, which caused the Java RIL code to
  fail with a "unknown host" exception when trying to setup
  net.dns1

Change-Id: I7f4e6f6f45d197960ecb20e7e8592272921fe694
Note: You also need to apply this emulator patch to verify
      this one: http://review.source.android.com//#change,20965

      The code in requestOrSendDataCallList() assumes that
      AT+CGACT? and AT+CGDCONT? will have answers with exactly
      the same number of lines (this wasn't the case before
      the emulator fix).