settings: Enable the status bar double-tap to sleep gesture

Change-Id: Ibe4f1d0c864f261211d7ded418abfe45633e1392

Conflicts:
	packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
[1/3]frameworks/base: add "Accept all files" option for incoming files via Bluetooth

This patch defines a key to store the option value in Settings Provider db

Change-Id: I993d7ec77b49f608a5a17e5a8516e52fc5d82946