- Make the background of popup key a full transparent color
- Updated the background mdpi asset of keyboard
Bug: 2975027
Bug: 3048638
Change-Id: I8709a1ca403e5c3f862a8be9be1668d30c7687f8
This change also introduces MiniKeyboardKeyDetector and
mini_keyboad_slide_allowance parameter to tune the key detection
behavior.
Bug: 2993769
Change-Id: I1932b0a382e172cb77b9e098ae182049c834dfe0