ueventd: add the import option from the init parser

Vendors have an interest in importing ueventd files based on certain
property values.  Instead of baking this logic in the ueventd binary,
add the import option from the init parser to the ueventd parser, to
allow vendors to expand as needed.

Test: imported files are parsed
Change-Id: I674987fd48f3218e4703528c6d905b1afb5fb366
diff --git a/rootdir/ueventd.rc b/rootdir/ueventd.rc
index 1994bdb..42229bd 100644
--- a/rootdir/ueventd.rc
+++ b/rootdir/ueventd.rc
@@ -1,3 +1,7 @@
+import /vendor/ueventd.rc
+import /odm/ueventd.rc
+import /ueventd.{ro.hardware}.rc
+
 firmware_directories /etc/firmware/ /odm/firmware/ /vendor/firmware/ /firmware/image/
 uevent_socket_rcvbuf_size 16M