Settings: Added cpu info and memory info to About Phone Settings

This is pulled from gingerbread. No code looked like it needed to
be re-done. This contains code from the following two commits.

shafty023<gameboy45@gmail.com>:
http://review.cyanogenmod.com/#change,1774

Keyan Mobli<persiansown@gmail.com>:
http://review.cyanogenmod.com/#change,1820

Patchset 2: Fix string constants
Patchset 3:
- Moved file paths to string constants
- Check for meminfo and cpuinfo files, if bad don't show preference
Patchset 4:
- Created variables for each operation.
- Wrote Long to print -1.
Patchset 5:
- Simplified and refactored
Patchset 6:
- Fix authorship herp derp
Patchset 7:
- Show only total memory, available memory would probably cause users to
  kill apps en masse.

Change-Id: Ib0550a5af515ae3a48481412c5c9c504cd80b743

Conflicts:

	res/values/strings.xml
	src/com/android/settings/DeviceInfoSettings.java
Settings : Switch state fix

Since the switch views are shared, we need to recreate them
in order to prevent from being reused as they don't share state.

Change-Id: I4d7038f37883e1791c8c2b0009f0adb85ebb2b88