Telephony: Set the value of min match according to one property

CTA requires to match 11 phone numbers, so use the value of the property
"persist.env.c.phone.matchnum" to set it 11 in case of CTA tests, but by
default it is 7 without change.

Change-Id: I8cd4105c06c71af1ad242858d8de474459d96ee1