Make accessibility long press timeout longer

The previous time out was 1500 milliseconds that wasn't enough for
announcing some accented letters, for example "Ü". This CL makes the
time out to 3000 milliseconds.

BUG: 15582951
Change-Id: I9bf864389c359e3b9abfe5000b897cf742a8dbe7

java/res/values/config-common.xml

@@ -48,7 +48,7 @@
     <integer name="config_max_longpress_timeout">700</integer>
     <integer name="config_min_longpress_timeout">100</integer>
     <integer name="config_longpress_timeout_step">10</integer>
-    <integer name="config_accessibility_long_press_key_timeout">1500</integer>
+    <integer name="config_accessibility_long_press_key_timeout">3000</integer>
     <integer name="config_max_more_keys_column">5</integer>
     <integer name="config_more_keys_keyboard_fadein_anim_time">0</integer>
     <integer name="config_more_keys_keyboard_fadeout_anim_time">100</integer>