This reverts commit 250a2a3ff3.
Reason for revert: For me (I use the Dvorak keyboard), this makes Ctrl+C and Ctrl+V to copy/paste completely unusable. My "c" key is physically the "I" key (`KeyI`), and the "V" key is physically the "." key (`Period`).
When dealing with shortcuts like this, one should use `KeyboardEvent.key`, not `KeyboardEvent.code`.
Bug: T62928
Change-Id: I64f625e0f32bd699790417d0d74a14251ac7dc36