Telephony: Screen status support for USAT phase 2

This fix has change to support Idle screen status information.
broadcast CAT_IDLE_SCREEN_ACTION Intent when ICC has requested
to be notified of Idle screen status.

Add RECEIVER_FOREGROUND flag for idle screen broadcast intent.
Normal priority broadcast intents get queued up in application broadcast
queue, if BOOT_COMPLETE is not yet received by the application.
Adding FLAG_RECEIVER_FOREGROUND to the intent allows it to be delivered
to the application without waiting for BOOT_COMPLETE.
This is necessary to prevent some GCF tests from timing out due to
delayed delivery of CAT_IDLE_SCREEN_ACTION to Stk application.

CRs-Fixed: 432647 454835 635236

Change-Id: Ie42e5249940032fd1fb71b903586ac873174f3c6
Conflicts:
services/core/java/com/android/server/am/ActivityManagerService.java