Add an option to change the device hostname (2/2).

This adds an option to modify the device hostname used
in ip resolution. This is useful when connecting to the
android device in a dynamic dhcp environment.

Change-Id: Ibc145b74036617248d4f33c6866cc9c8a8cc8974
Settings: Fix wifi developer options summaries

Change-Id: I85688d59685d3a0b0a48e51581eee77ebc7cd2fa
Developer Options: launch the Development app

Change-Id: I0f798d197888ef7f40688009536040e061c410f4
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 branch 'cm-12.0' of git://github.com/CyanogenMod/android_packages_apps_Settings into cm-12.0