There was a bug where older platforms only stored the 'enabled'
value if the checkbox in Settings was toggled at least once. This
caused the checkbox to be checked off when upgrading the device.
The code now mimicks the old behavior by detecting a non-empty
info string and setting 'enabled' appropriately.
Fixes bug 8659048
Change-Id: If2431d54f168a0aab286628165dd3f6b4a0d5cf8
This helps reduce the pressure on framework.jar, and makes it clear
that it should only be used by the system_server.
Bug: 7333397
Change-Id: I0858904239535380fbf30562b793e277d8c3f054
