Merge pull request #13658 from RudyLu/keyboard/Bug931201-dutch_keyboard_layout

Bug 931201 - Add Dutch keyboard layout, fix some locale-layout mapping, r=timdream(cherry picked from commit ea2711787ece8d6f4d22c310d3e8a8080a5ee090)
Merge pull request #13551 from lodr/bug-934921-null-sms

Bug 934921 - Making getSegmentInfoForTest() asynchronous
r=arcturus(cherry picked from commit b9755c73c7faaf949d74c14f2a58dd542b5da543)