Remove vendor from android.hardware.cas-service_fuzzer

Fuzzer fails to get defaultServiceManager due to hermiticity issues
when vendor is enabled in cc_fuzz which uses vendor variant of
libbinder under libbinder_ndk.

Test: m android.hardware.cas-service_fuzzer && adb sync data && adb
shell
/data/fuzz/x86_64/android.hardware.cas-service_fuzzer/android.hardware.cas-service_fuzzer
-runs=10000
Bug: 301768467

Change-Id: Ief27f75f4330973fc194c77ea36cdbb826f35807