Revert "[3/3] InCallUI: allow disabling non intrusive incall ui"

This reverts commit 0b503dc34d983363eea5166304c55d2017c92309.
Revert "InCallUI: Disable Back button on Non-intursive InCall Card"

This reverts commit f42a871b56621953f9b9e11dcaf348298e2d6d76.
Revert "[1/2] InCall: Add a non-intrusive dialog for incoming calls"

This reverts commit e10af45cb998ddef02520db5de37dee57113f276.

Conflicts:
	AndroidManifest.xml
InCallUI: Heads up meets SlimKat....SlimKat meets Google IO [2/4]
Add native heads up support on dialer.

We only have show call in background feature. We combine it now with heads up.
So it is doing exactly same like on Google IO was shown.

Enabled by default.

- Notification is expanded by default
- Send as requested to force show the heads up no matter what.

Change-Id: Idc1ef59e9821293ac69a72767f918c07acaafc83

Conflicts:
	src/com/android/incallui/InCallPresenter.java
	src/com/android/incallui/StatusBarNotifier.java