Revert "Support KeyEvent.KEYCODE_ENTER on the keyguard"

This reverts commit 5919cb74ace388b338b90c038622ffeaf3430689.

Reason for revert: b/296671124
Fixes: 296671124
Bug: 270883077

Change-Id: If083ce507305740755a4677157450e8497c10455
2 files changed