Add config for the expire age of partial segment messages.

Set the value to 30 days based on default value in code,
then it could be customized via res overlay mechanism.

Change-Id: I46fda3389a34b99b6e8e5bdb07a16a28ba49ca23
Introduce a new config item: config_lte_capable

config_lte_capable is set to true when the device is
LTE capable.

CRs-Fixed: 628506

Conflicts:
core/res/res/values/config.xml
core/res/res/values/symbols.xml
Change-Id: I0032ff41a37509eb0acf25f1ee08de6cbd01511e

Conflicts:
	core/res/res/values/config.xml