Revert "HeadsUp: option to launch in floating window (2/2)"

This reverts commit d1ed97b5beb5770d43918e7c1445c22e64eac372.

Conflicts:
	res/values/cm_strings.xml
	res/xml/heads_up_settings.xml

Change-Id: I88dd8b7aaa8af2b3a8f35e7257ffcd4ab42176e2
Revert "HeadsUp: User configurable timeout (2/2)"

This reverts commit 06ac4692d459136e4f19c41dd1af78658e04c13c.

Conflicts:
	res/values/attrs.xml
	res/values/cm_strings.xml
	res/xml/heads_up_settings.xml
	src/com/android/settings/headsup/HeadsUpSettings.java

Change-Id: Ie5be4181791fcfe7e90831c725fd56ac4d72806b