LatinIME: disable sound on keypress on all devices by default

* This sound is horrible and tablet users shouldn't be subject
  to listening to it through setupwizard either.

Change-Id: Ia6b6db31fb9a986c2a68773dc69524aed5e5af08
Signed-off-by: Mohammad Hasan Keramat J <ikeramat@protonmail.com>

java/res/values-sw600dp/config-per-form-factor.xml

@@ -23,7 +23,7 @@
     <bool name="config_enable_show_key_preview_popup_option">false</bool>
     <!-- Whether or not Popup on key press is enabled by default -->
     <bool name="config_default_key_preview_popup">false</bool>
-    <bool name="config_default_sound_enabled">true</bool>
+    <bool name="config_default_sound_enabled">false</bool>
     <bool name="config_enable_show_voice_key_option">false</bool>
     <bool name="config_key_selection_by_dragging_finger">false</bool>
     <!-- Showing more keys keyboard, just above the touched point if true, aligned to the key if

java/res/values-sw768dp/config-per-form-factor.xml

@@ -23,7 +23,7 @@
     <bool name="config_enable_show_key_preview_popup_option">false</bool>
     <!-- Whether or not Popup on key press is enabled by default -->
     <bool name="config_default_key_preview_popup">false</bool>
-    <bool name="config_default_sound_enabled">true</bool>
+    <bool name="config_default_sound_enabled">false</bool>
     <bool name="config_enable_show_voice_key_option">false</bool>
     <bool name="config_key_selection_by_dragging_finger">false</bool>
     <!-- Showing more keys keyboard, just above the touched point if true, aligned to the key if