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/26.0/26.0.ignore.cil b/private/compat/26.0/26.0.ignore.cil
index 3a493e0..859e45d 100644
--- a/private/compat/26.0/26.0.ignore.cil
+++ b/private/compat/26.0/26.0.ignore.cil
@@ -3,7 +3,8 @@
 ;;   previous ones.  Add here to pass checkapi tests.
 (typeattribute new_objects)
 (typeattributeset new_objects
-  ( adbd_exec
+  ( adb_service
+    adbd_exec
     bootloader_boot_reason_prop
     blank_screen
     blank_screen_exec
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
diff --git a/private/service_contexts b/private/service_contexts
index 71d4845..985444f 100644
--- a/private/service_contexts
+++ b/private/service_contexts
@@ -1,6 +1,7 @@
 accessibility                             u:object_r:accessibility_service:s0
 account                                   u:object_r:account_service:s0
 activity                                  u:object_r:activity_service:s0
+adb                                       u:object_r:adb_service:s0
 alarm                                     u:object_r:alarm_service:s0
 android.os.UpdateEngineService            u:object_r:update_engine_service:s0
 android.security.keystore                 u:object_r:keystore_service:s0