Revert "InCallUI: Disable Back button on Non-intursive InCall Card"

This reverts commit 4b5e16df4eaabd5c129877456a2684d4b23aacef.
Revert "InCallUI: fix non intrusive incallui layout"

This reverts commit cfb43dbf19ffcd49770bb18ba9b7686be49af808.
Revert "[3/3] InCallUI: allow disabling non intrusive incall ui"

This reverts commit 040330c8a3c8be23931761d6efc0435f19c42666.
InCallUI: Incoming Call in Background (1/3)

Patch ported from 4.2 which was done by our lovely HCP. A
very popular one so we bring it back and adapt it to 4.4

Allows user to set that Incoming Call UI will remain in background
if screen is on. Instead, a notification is added to StatusBar, which
can be used to bring up the Incoming Call UI. Ringtone and vibration
still occur as per system settings.

This has the same effect as apps marked as "immersive". It prevents
the incoming call from backgrounding the current activity.

PatchSet:
- show normal inCallUI if keyguard is currently active

PS:
- cleanup

PS
- do not try to get the services if the feature is disabled

PS:
- do not disable notificationshade and navbar if it is a background call

PS:
- derp

Change-Id: I68e432a548c10d07cc9d668782cb544fbb4d421d

Conflicts:

	src/com/android/incallui/InCallPresenter.java
InCallUI: add decline and answer  incoming call action on notifications

Add decline and answer call action on notification if an call is incoming. Especially
usefull for call in background feature to have the ability to directly
decline or answer a incoming call. But as well usefull to decline/answer a second call
during one is incomming.

PS:
- found a better way for the answer button

PS:
- fix keep flip action alive
- fix collapse notification shade when answering call
- answer call before starting the UI to do not have
  shown the incall screen for a brief second

PS:
- fix wrong user on sending close system dialogs

Change-Id: I92d8f5a2de74f9877a61c4da4c3eaf2e25230895

Conflicts:

	src/com/android/incallui/InCallPresenter.java
Keep InCallUI in memory (1/3)

In lower end devices, startup of the InCallUI process can take
up to 10 seconds when the device is busy, which prevents the user
from taking the call. Keep the process in memory like previous
versions where they are a part of Phone.apk.

This converts InCallUI into a dummy apk with the persistent
attribute set to true and allows the activity from Dialer.apk,
which uses the com.android.incallui process to be loaded into the
persistent process.

Change-Id: Idfb7fa760eacc8d6e46d50ce682fb06c0acfc8f4

Conflicts:

	AndroidManifest.xml