Revert some of the latest changes (1/2)

Revert "Keyguard: fix leaking ContentObserver"

This reverts commit 4a4c9eff7740516f565d3fa2a9ca89296e1c0eca.

Revert "Keyguard: fix transparent lockscreen"

This reverts commit 28dc075a8b24eafc72a4b02ff95f3263efff909e.

Revert "base: Transparent Lockscreen from PA"

This reverts commit 0cc1c8e8bd03ab013a059b7ee4f27c3b570f916c.

Revert "Move OnClick Fliptile to PAC settings table."

This reverts commit 05422360f8e7571063a745458dd1a8cb52b3ca57.

Revert "Settings: add methods to put and get boolean values"

This reverts commit 7461748314d258f9f544573eeb76c897f7d81b02.

Revert "PAC Settings"

This reverts commit aa344a73dddc3d1c2056916cd56ab209be027306.

Change-Id: Ib019fbb71a92f0bbb44ab1926e9a594b26bf70be
Signed-off-by: Lokesh Chamane <lokesh.c703@gmail.com>