Settings: Hide Development settings when it is turned off

This commit hides the Development and Performance settings items
when the user turns off Development settings. This sets things back
to tapping x number of times on the build number to once again enable
developer settings

Change-Id: I6003f73f5abee54bb000f01757ecffe7b68dba59
Development Settings: fix setting reset on disable

When Development Settings are disabled, some settings are
reset to values other than the default. This fixes it.

 - Adb notify should reset to enabled

 - Verify apps over usb should reset to enabled

Change-Id: Ifa1ee25cfab32b7a236e02055006f0d2a4b07f37
Merge remote-tracking branch 'cm/cm-12.0' into cm-12.0