libbinder: Don't abort when rpc parcel size is invalid

No test becaue this is only reachable by bypassing the binder client
library (i.e. writing non-sense directly to the socket).

Test: binder_rpc_fuzzer
Bug: 238497894
Change-Id: I85ef57df4b8970c35904a5e84e61cb87653a39be
2 files changed