Telephony: Incoming Call in Background (2/3)

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.

PS: reorder settings a bit

Change-Id: I159bd817ebcc39a0733f9433feb29b310adbc2aa

Conflicts:
	res/values/slim_strings.xml
	res/xml/call_feature_setting.xml
	src/com/android/phone/CallFeaturesSetting.java
ServicesTelephony: Update IT Translation

Change-Id: I7b40ac5744d1922df19ab9fe99f47179fac64c6a
Merge remote-tracking branch 'PA/kitkat' into remix-staging

Conflicts:
	res/xml/call_feature_setting.xml
	src/com/android/phone/CallFeaturesSetting.java
Revert "[2/3] Telephony: allow disabling non intrusive incall ui"

This reverts commit 71f02274f722cd78cc9313c3184e5f160a767290.

Conflicts:
	res/values/pa_strings.xml
	res/xml/call_feature_setting.xml
	src/com/android/phone/CallFeaturesSetting.java
Merge "ServicesTelephony: Update IT Translation" into kitkat
Merge remote-tracking branch 'PA/kitkat' into remix-staging
Services/Telephony: Translation Import Spanish

Change-Id: Icc9ce1358378182a933ca684bf4fc1fd04a40042
Services/Telephony: Translation Import German

Change-Id: I62ded5722b264fe5b150d7318c1161cf43dee639
Services/Telephony: Translation Import Polish

Change-Id: Iea1b300475d07003f8f2560fe2e7032be24fae4a
Services/Telephony: Translation Import Indonesian

Change-Id: I1231913c63aecc15965c0f2ab776b66ba116e393
Services/Telephony: Translation Import Portuguese, Brazilian

Change-Id: If7de13676ad9b66f6521c49d5845714536b171fb
Services/Telephony: Translation Import Italian

Change-Id: I0d11a025954690a2013428a5ea17483e6253171e
Services/Telephony: Translation Import Dutch

Change-Id: I410b3f7ac330746fbe4fd27cd785bf69b492d1ea
Services/Telephony: Translation Import Chinese (Simplified)

Change-Id: Ie7f204243f12409286fcdf5db5631beba0c39b5b
Services/Telephony: Translation Import Catalan

Change-Id: Ic9225f7dfd9b8b13e5fcb3c6eab260b8b10717fc
Merge "Services/Telephony: Translation Import Chinese (Simplified)" into kitkat
Merge "Services/Telephony: Translation Import Dutch" into kitkat
Merge "Services/Telephony: Translation Import Italian" into kitkat
Merge "Services/Telephony: Translation Import Portuguese, Brazilian" into kitkat
Merge "Services/Telephony: Translation Import Indonesian" into kitkat