[1/2] User configurable double tap to sleep gesture

Add options to enable
  * glow pad double tap gesture to put device to sleep.
  * pattern double tap gesture to put device to sleep.
  * pin & password double tap gesture to put device to sleep.
  * status bar double tap gesture to put device to sleep.

[1/2] 用户可配置的双击锁屏手势

添加选项来启用
  * 双击光圈锁屏的手势
  * 双击图案盘的手势
  * 双击密码输入框锁屏的手势
  * 双击通知栏锁屏的手势

[2/2] in platform_packages_apps_Settings

Thanks to CyanogenMod(@dalingrin and @travp624) for the original
implementation.
Thanks to @rascarlo for the user configurable concept.

感谢CyanogenMod(@dalingrin and @travp624)对此功能的原创实现.
感谢@rascarlo的用户可配置理念.

Reference commits:
参考commits:

CyanogenMod/android_frameworks_base@f258f4479bc5397ad2c4d1ffa07125a036360196 (or http://review.cyanogenmod.org/55645)
CyanogenMod/android_frameworks_base@c0fdfafc8c2d9620172dcfad81f9100e1883e1bb (or http://review.cyanogenmod.org/57257)
rascarlo/android_frameworks_base@59238e59cfecf4620eb59e93753eb2e8d16b3dbc