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Settings: add  Display/TapToWake

          Forward TapToWake from CM11

          Contains Commits:

          Author: Ricardo Cerqueira<cyanogenmod@cerqueira.org>
          DisplaySettings: Add hardware-framework support for tap-to-wake

          Since we have tap-to-sleep globally, might as well support the
          wake gesture as a standalone thing through the HAF. Place it in
          "Display".
          Change-Id: I6facc2334ff9e80077581c54c428476594e91528

          Author: Roman Birg <roman@cyngn.com>
          Settings: set proper default value for tap to wake

          The first time the display_settings.xml file gets inflated, the
          PreferenceManager takes the defaultValue and persists it in the default
          shared preferences file.
          When we read the double tap to wake preference,
          we assume it has a default value of true, which it uses until the user
          enters Display Settings for the first time. At that point, the default
          value is persisted, and every boot after will use the default value in
          display_settings.xml.
          Remove the default defined in the XML file.
          Change-Id: I0989dd73b6b3c42ff8649bc17eebf4e191293ee4

Change-Id: I271390aa7bfc56811dcf6fff7e1d05c76c4bfa48

Conflicts:
	res/values/cm_strings.xml
	res/xml/display_settings.xml
	src/com/android/settings/DisplaySettings.java