Add shared library into i18n APEX and add the required sepolicy

Bug: 138994281
Test: device boots
Change-Id: Ief9dace8557c1d0e5a32222b2c7d1effc50f2847
diff --git a/apex/com.android.i18n-file_contexts b/apex/com.android.i18n-file_contexts
index c8b6ba1..51d45a0 100644
--- a/apex/com.android.i18n-file_contexts
+++ b/apex/com.android.i18n-file_contexts
@@ -2,3 +2,4 @@
 # System files
 #
 (/.*)?                   u:object_r:system_file:s0
+/lib(64)?(/.*)?                u:object_r:system_lib_file:s0