[settings] Do not grab touch input devices by default. Fixes JB#39800

Grabbing used to be necessary back when only multitouch protocol a
devices were supported. But we should never block mt protocol b inputs
and grabbing protocol a inputs is not needed either anymore.

To avoid requiring a do-not-grab-touch-input configuration file for every
multitouch protocol b device out there, switch default input grab setting
from "keypad and touch" to "keypad only".

Signed-off-by: Simo Piiroinen <simo.piiroinen@jollamobile.com>

event-input.h

@@ -108,7 +108,7 @@
 # define MCE_INPUT_GRAB_ALLOW_NONE          (0)
 # define MCE_INPUT_GRAB_ALLOW_TS            (1<<0)
 # define MCE_INPUT_GRAB_ALLOW_KP            (1<<1)
-# define MCE_DEFAULT_INPUT_GRAB_ALLOWED     3 // = MCE_INPUT_GRAB_ALLOW_TS | KP
+# define MCE_DEFAULT_INPUT_GRAB_ALLOWED     2 // = MCE_INPUT_GRAB_ALLOW_KP
 
 /* ========================================================================= *
  * Functions