Merge "Add KEYCODE_LAST_CHANNEL mapping to LKC KEY_LAST" am: 1710dbd097 am: c3fb05c1db am: 5dd5e5c937 am: 32f405be5d

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1365551

Change-Id: I74b751de02f78d9ec6801f5a1e0ba352d0ee005f