Add back supplementary service notification handling.

Change-Id: Id4cdc4dbae1c262041ab3afcb3264dfe6d3673fa

Change-Id: I920fe9c7bdab658385869aa4889eaf6d1d95fc72
Make incall screen glopad background themeable

Change-Id: I6a0a120662e4e45b5282a763c8ccf41d29c6d470
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