Revert "Fix key letter size of 5-rows Thai keyboard"

java/res/values-land/dimens.xml

java/res/values-sw600dp-land/dimens.xml

java/res/values-sw600dp/dimens.xml

java/res/values-sw768dp-land/dimens.xml

java/res/values-sw768dp/dimens.xml

java/res/values/dimens.xml

java/res/xml-sw600dp-land/kbd_thai.xml

java/res/xml-sw600dp/kbd_thai.xml

java/res/xml-sw768dp-land/kbd_thai.xml

java/res/xml-sw768dp/kbd_thai.xml

java/src/com/android/inputmethod/keyboard/Keyboard.java

java/src/com/android/inputmethod/keyboard/KeyboardView.java

java/src/com/android/inputmethod/latin/ResourceUtils.java