settings: Show more hardware information about the device [1/3]

pulls the following build.prop settings and displays them

ro.device.chipset=value
ro.device.cpu_info=value
re.device.gpu=value
ro.device.front_cam=value
ro.device.rear_cam=value
ro.device.screen_res=value

PS9: rename cpu to cpu_type
     add cpu info

PS10: add device codename info (I think it may be useful)
      see http://i.imgur.com/NuSacL1.png

Change-Id: I5da59cac0e924953679f7a69ba17cb8df7b59a91

Conflicts:
	res/values/pac_strings.xml
	res/xml/device_info_settings.xml
	src/com/android/settings/DeviceInfoSettings.java
Revert "wlan: Provide runtime option to enable or disable rssi threshold (settings)"

This reverts commit d6b8cbb12629562edad5915a1273f87438215c73.

RSSI threshold parameters are now user configurable.Below are the
parameters.
THRESHOLD_UNBLACKLIST_HARD_5G
THRESHOLD_UNBLACKLIST_SOFT_5G
THRESHOLD_UNBLACKLIST_HARD_24G
THRESHOLD_UNBLACKLIST_SOFT_24G
THRESHOLD_INITIAL_AUTO_JOIN_ATTEMPT_RSSI_MIN_5G
THRESHOLD_INITIAL_AUTO_JOIN_ATTEMPT_RSSI_MIN_24G
Hence reverting the gerrit

Change-Id: If40cc281f8d13a9c3255e4306db45bc3ef4002ac
CRs-Fixed: 757958

(cherry picked from commit d63af7eec149728c0f8027ac2309ab06b9d1a414)