DeviceInfoSettings: Update the cpuinfo parser

Parsing /proc/cpuinfo for the processor type assumes a format that
isn't true in later kernel versions. Update the parser to be more
generic and search specifically for the "Processor" descriptor

Change-Id: I9d5bbf29a8383fcb9357a6950dea4202b05f50ab
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_Settings into android-4.4_new