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
InCallActivity: consume back key on incoming call screen

Users will not be able to anything if the physical back key is
pressed on the incoming call screen (return to home screen with
nothing responding.)

Forward porting the key consumption from 4.3

Change-Id: Iea0734852bac7ca5a25e19ec9d9ee7c80dba6741
InCallUI: Set Ticker to contact

Display contact/number/confrence
	in notification ticker.

PS2:
Implement Kufikugel's suggestion.
	Incoming call ticker only.

Change-Id: Ie89cceb67aecbf3dd15abd07dc35110f7fddc2f9

Conflicts:
	src/com/android/incallui/StatusBarNotifier.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:
	AndroidManifest.xml

Conflicts:
	src/com/android/incallui/InCallPresenter.java
	src/com/android/incallui/StatusBarNotifier.java
background call fix