private/file_contexts: delist ART binaries under /system/bin

These are in the ART APEX and covered by
apex/com.android.art.{debug,release}-file_contexts.

Bug: 160683548
Test: boot and check no avc denied messages logcat
Change-Id: I8024b3e37bb3e680739c45b08e4a846f2adea98c
1 file changed