Adding service manager fuzzer. Android platform specific macros are added in...

Adding service manager fuzzer. Android platform specific macros are added in access.cpp because of dependency on libselinux.

Steps to run:
On host :
m servicemanager_fuzzer && $ANDROID_HOST_OUT/fuzz/x86_64/servicemanager_fuzzer/servicemanager_fuzzer
On Device:
cd ${ANDROID_PRODUCT_OUT}
adb root
adb sync data
adb shell /data/fuzz/$(get_build_var TARGET_ARCH)/servicemanager_fuzzer/servicemanager_fuzzer

Test: atest servicemanager_test
Bug: 232439428
Change-Id: Ic20b7e842bcaa40762e612557a3d85bf009ae105