Use system's plat_sepolicy.cil for microdroid

Bug: 178993690
Test: boot microdroid
Change-Id: Ic171762fbf62cdfc32efbba3c42077fb55a6cd02
diff --git a/microdroid/Android.bp b/microdroid/Android.bp
index 3eee6f4..ad4e8d5 100644
--- a/microdroid/Android.bp
+++ b/microdroid/Android.bp
@@ -58,7 +58,6 @@
 
         // These files are temporary and only for test.
         // TODO(b/178993690): migrate cil files to Soong
-        "microdroid_plat_sepolicy.cil",
         "microdroid_plat_mapping_file",
         "microdroid_plat_sepolicy_and_mapping.sha256",
     ] + microdroid_shell_and_utilities,
@@ -66,6 +65,7 @@
         common: {
             deps: [
                 "com.android.runtime",
+                "plat_sepolicy.cil",
                 "plat_file_contexts",
                 "plat_hwservice_contexts",
                 "plat_property_contexts",
@@ -242,7 +242,7 @@
 genrule {
     name: "microdroid_plat_sepolicy_and_mapping.sha256_gen",
     srcs: [
-        ":microdroid_plat_sepolicy.cil",
+        ":plat_sepolicy.cil",
         ":microdroid_plat_mapping_file",
     ],
     out: ["plat_sepolicy_and_mapping.sha256"],
@@ -271,7 +271,7 @@
     name: "microdroid_precompiled_sepolicy_gen",
     tools: ["secilc"],
     srcs: [
-        ":microdroid_plat_sepolicy.cil",
+        ":plat_sepolicy.cil",
         ":microdroid_plat_mapping_file",
         ":microdroid_plat_pub_versioned.cil",
         ":microdroid_vendor_sepolicy.cil",