Adding adb_debug.prop into debug ramdisk

The debug ramdisk can only be used if the device is unlocked.
When it's used, init will load adb_debug.prop and the userdebug
sepolicy from the debug ramdisk, to allow adb root on a user build.

Bug: 126493225
Test: 'make' and checks the file is installed
Change-Id: Id6962414197fc8f47f7c07818e8fb16107dc17a3
diff --git a/init/Android.mk b/init/Android.mk
index 39af0e6..7ab5c48 100644
--- a/init/Android.mk
+++ b/init/Android.mk
@@ -65,6 +65,11 @@
 LOCAL_MODULE_PATH := $(TARGET_RAMDISK_OUT)
 LOCAL_UNSTRIPPED_PATH := $(TARGET_RAMDISK_OUT_UNSTRIPPED)
 
+# Install adb_debug.prop into debug ramdisk.
+# This allows adb root on a user build, when debug ramdisk is used.
+LOCAL_REQUIRED_MODULES := \
+   adb_debug.prop \
+
 # Set up the same mount points on the ramdisk that system-as-root contains.
 LOCAL_POST_INSTALL_CMD := mkdir -p \
     $(TARGET_RAMDISK_OUT)/apex \