Revert "Heads up: option to disable in lockscreen (2/2)"

This reverts commit ab5c3cf162aa015071c8a5e62d3fdb6d45b655d4.
Revert "Heads up Floating window default to off"

This reverts commit d05bce6bb0104459905fd4ec6b94f94165211478.
Revert "HeadsUp: option to launch in floating window [2/2]"

This reverts commit 4301a1af09849677596c4e8fb29209f08c301007.

Conflicts:
	res/values/cr_strings.xml