Use resizeOutVector in IncidentReportArg

IncidentReportArg doesn't handle cases when incorrect vector
length is provided in parcel. Using resizeOutVector Parcel API
instead.

Test: atest incidentd_test
Test: m incidentd_service_fuzzer && adb sync data && adb shell /data/fuzz/x86_64/incidentd_service_fuzzer/incidentd_service_fuzzer
with clusterfuzz testcase
Bug: 283079842

Change-Id: I1682c8920c64faf5b0f2f6cd54b8517ec0f5d877