Add SEPolicy tags for concrypt cacerts.

Test: booting
Change-Id: I53815eb272fcdff739ba596cc1dd6bcca57c7d12
diff --git a/apex/com.android.conscrypt-file_contexts b/apex/com.android.conscrypt-file_contexts
index abf0085..7b81ab8 100644
--- a/apex/com.android.conscrypt-file_contexts
+++ b/apex/com.android.conscrypt-file_contexts
@@ -4,3 +4,4 @@
 (/.*)?                          u:object_r:system_file:s0
 /lib(64)?(/.*)?                 u:object_r:system_lib_file:s0
 /bin/boringssl_self_test(32|64) u:object_r:boringssl_self_test_exec:s0
+/cacerts(/.*)?                  u:object_r:system_security_cacerts_file:s0