Revert "Revert "Settings: Shake Sensitivity (2/2)""

This reverts commit 7ac649d4682e2c4a3ed34f5f671f4f60aa68a3fc.

Conflicts:

	res/values/slim_arrays.xml
	res/values/slim_strings.xml
	res/xml/accessibility_settings.xml
	src/com/android/settings/accessibility/AccessibilitySettings.java