Trigger IME switcher by long-pressing space key

Long press time out for space key is set to 1000msec.
FYI: Time out for shift key is 1200ms and for mini popup keyboard is 400ms.

Bug: 4971680
Change-Id: Id05f519baa15ca2e54958997ddf7b6b3b7a2d078
diff --git a/java/res/values/config.xml b/java/res/values/config.xml
index 86eeae7..bc64eb2 100644
--- a/java/res/values/config.xml
+++ b/java/res/values/config.xml
@@ -60,7 +60,10 @@
     <integer name="config_keyboard_grid_width">32</integer>
     <integer name="config_keyboard_grid_height">16</integer>
     <integer name="config_long_press_key_timeout">400</integer>
+    <!-- Long pressing shift will invoke caps-lock if > 0, never invoke caps-lock if == 0 -->
     <integer name="config_long_press_shift_key_timeout">1200</integer>
+    <!-- Long pressing space will invoke IME switcher if > 0, never invoke IME switcher if == 0 -->
+    <integer name="config_long_press_space_key_timeout">1200</integer>
     <integer name="config_touch_noise_threshold_millis">40</integer>
     <integer name="config_double_spaces_turn_into_period_timeout">1100</integer>
     <dimen name="config_touch_noise_threshold_distance">2.0mm</dimen>