telephony: Change default preferred network for LTE_ON_CDMA_TRUE

In case of LTE_ON_CDMA_TRUE, default network is NT_MODE_GLOBAL(7).
NT_MODE_GLOBAL(7) supports GMS/WCDMA, CDMA, and EvDo from RILConstants.java.
However, it need to support LTE. NT_MODE_LTE_CMDA_EVDO_GSM_WCDMA(10) supports
LTE, CDMA, EvDo, GSM/WCDMA.
So it should be changed to NT_MODE_LTE_CDMA_EVDO_GSM_WCDMA.

Change-Id: I8ad8d113287d2eda110e59d032df7b421884052f
Merge commit 'refs/changes/91/60391/1' of https://android.googlesource.com/platform/frameworks/opt/telephony into cm-10.2