Add fuzzer for AIDL broadcast radio

Refactored Android.bp file and added fuzzer for default AIDL broadcast
radio HAL.

Bug: 246857025
Test: SANITIZE_TARGET=address make android.hardware.broadcastradio-service.default_fuzzer
cd ${ANDROID_PRODUCT_OUT}
adb root && adb sync data
adb shell /data/fuzz/x86_64/android.hardware.broadcastradio-service.default_fuzzer/vendor/android.hardware.broadcastradio-service.default_fuzzer --test_env=ENABLE_BLAZE_TEST_FUZZING=1 --test_arg=--minloglevel=0

Change-Id: I443fe6fccccb51626e6a58819f3f28ce11b0bff8