sepolicy: label vendor_service_contexts as vendor_service_contexts_file

Due to AIDL HAL introduction, vendors can publish services
with servicemanager. vendor_service_contexts is labeled as
vendor_service_contexts_file, not nonplat_service_contexts_file.
And pack it to vendor partition.

Bug: 154066722

Test: check file label
Merged-In: Ic74b12e4c8e60079c0872b6c27ab2f018fb43969
Change-Id: Ic74b12e4c8e60079c0872b6c27ab2f018fb43969
11 files changed