microdroid: Set mls_cats to 1

Because MLS isn't really used in microdroid, setting it to 1 may help
improve performance a bit.

Bug: 223596384
Test: atest MicrodroidTests
Change-Id: Iace4a45ccda98e34fbf82b16ff2096a53b543132
diff --git a/microdroid/Android.bp b/microdroid/Android.bp
index 0600207..0628a5b 100644
--- a/microdroid/Android.bp
+++ b/microdroid/Android.bp
@@ -109,6 +109,7 @@
     name: "microdroid_reqd_policy_mask.conf",
     srcs: reqd_mask_files,
     installable: false,
+    mls_cats: 1,
 }
 
 se_policy_cil {
@@ -122,6 +123,7 @@
     name: "microdroid_plat_sepolicy.conf",
     srcs: system_policy_files,
     installable: false,
+    mls_cats: 1,
 }
 
 se_policy_cil {
@@ -135,6 +137,7 @@
     name: "microdroid_plat_pub_policy.conf",
     srcs: system_public_policy_files,
     installable: false,
+    mls_cats: 1,
 }
 
 se_policy_cil {
@@ -171,6 +174,7 @@
     name: "microdroid_vendor_sepolicy.conf",
     srcs: vendor_policy_files,
     installable: false,
+    mls_cats: 1,
 }
 
 se_policy_cil {
@@ -287,4 +291,5 @@
     srcs: system_policy_files,
     exclude_build_test: true,
     installable: false,
+    mls_cats: 1,
 }