Merge "Add Mongolian keyboard layout support" am: 24fd25c51c am: 4387ef6668 am: 9f73b1fc6f am: b8e42a2f20

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1417620

Change-Id: I665dc8e56834e8d7bb77dd701a0d72a9f7e5ff37