"Add shared library into i18n APEX and add the required sepolicy" Attempt 2

The change was reverted due to a cause unrelated to sepolicy change.
It was submitted in https://r.android.com/1283724.
Now, submit this independent of the topic.

Bug: 138994281
Test: device boots
Change-Id: I9943abb814a8043f66545e7db5225adbd62d19d2
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