Fix an OOB bug in BqrVseSubEvt::ParseBqrLinkQualityEvt

The size of the packet is not checked when
`vendor_cap_supported_version >= kBqrIsoVersion` holds.
This patch adds a check on the size in this code path.

Bug: 242993878
Test: manual
Tag: #security
Ignore-AOSP-First: security
Merged-In: I3191701c54b342ef3cf2296de075666b13e3096e
Change-Id: I3191701c54b342ef3cf2296de075666b13e3096e