Add ADB system service

ADB is being separated from USB service since it's not tied to the USB
transport. This duplicates the usb_service's settings to adb_service for
this purpose.

Bug: 63820489
Test: make
Change-Id: Idbcfbe470d7568f9cba51f0c8d4a8ee9503db93d
diff --git a/private/compat/27.0/27.0.ignore.cil b/private/compat/27.0/27.0.ignore.cil
index 99db662..998ac5f 100644
--- a/private/compat/27.0/27.0.ignore.cil
+++ b/private/compat/27.0/27.0.ignore.cil
@@ -3,7 +3,8 @@
 ;;   previous ones.  Add here to pass checkapi tests.
 (typeattribute new_objects)
 (typeattributeset new_objects
-  ( blank_screen
+  ( adb_service
+    blank_screen
     blank_screen_exec
     blank_screen_tmpfs
     bootloader_boot_reason_prop