Add settings for exceptional display on state durations

Certain triggers like incoming call, alarm, usb connect, volume key
press, etc can cause the display to be turned on briefly. Many users
wish to tweak display on time following some triggers, but the durations
are hard coded.

Replace all hard coded durations with settings that can be changed
at run-time.

Allow disabling of individual triggers by setting zero duration.

Add mcetool options for changing the settings and showing the current
values.

[mce] Add settings for exceptional display on state durations. Fixes JB#27426

builtin-gconf.c

@@ -1615,6 +1615,66 @@ static const setting_t gconf_defaults[] =
     .type = "i",
     .def  = "0", // = disabled
   },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_CALL_IN,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_CALL_IN),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_CALL_OUT,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_CALL_OUT),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_ALARM,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_ALARM),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_USB_CONNECT,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_USB_CONNECT),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_USB_DIALOG,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_USB_DIALOG),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_CHARGER,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_CHARGER),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_BATTERY,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_BATTERY),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_JACK_IN,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_JACK_IN),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_JACK_OUT,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_JACK_OUT),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_CAMERA,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_CAMERA),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_VOLUME,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_VOLUME),
+  },
+  {
+    .key  = MCE_GCONF_EXCEPTION_LENGTH_ACTIVITY,
+    .type = "i",
+    .def  = G_STRINGIFY(DEFAULT_EXCEPTION_LENGTH_ACTIVITY),
+  },
   {
     .key  = NULL,
   }