Un-hide WPS methods (and required interface classes, etc.) of WifiManager to enable Apps to start/stop the WPS procedure, add a patch for WPS method KEYPAD to avoid early failure callbacks. (Methods PBC, DISPLAY, KEYPAD tested on 4.4.2_r2.) Change-Id: I25aafdc4b637c87d754d4fdb70e40a34a569b738 Signed-off-by: Olaf Stoyke <o.stoyke@avm.de>