In native coverage builds, allow all domains to access /data/misc/trace

Bug: http://b/135139675

Coverage files are written to /data/misc/trace (governed by the
method_trace_data_file selinux type).  Allow all domains to access
(create directories, access files) this directory when native coverage
is enabled (by setting NATIVE_COVERAGE to true) in an userdebug or eng
build.

Also relax neverallow constraints to allow access to
method_trace_data_file for native coverage builds.

Test: Build 32-bit cuttlefish with coverage:
          m NATIVE_COVERAGE=true COVERAGE_PATHS="*"
      and verify that there are no selinux denials in kernel log and
      logcat.

Change-Id: I3fe7c77612854b9de7de7a0ddd5cbf44a2f5c21e
diff --git a/private/recovery_refresh.te b/private/recovery_refresh.te
index b6cd56f..3c095cc 100644
--- a/private/recovery_refresh.te
+++ b/private/recovery_refresh.te
@@ -3,4 +3,8 @@
 init_daemon_domain(recovery_refresh)
 
 # recovery_refresh is not allowed to write anywhere
-neverallow recovery_refresh { file_type userdebug_or_eng(`-coredump_file') }:file write;
+neverallow recovery_refresh {
+  file_type
+  userdebug_or_eng(`-coredump_file')
+  with_native_coverage(`-method_trace_data_file')
+}:file write;