DO NOT MERGE - temporarily disable vendor file check for mainline

We want to use prebuilts for apex modules for qt-*-dev, but it is
running afoul of the vendor file check.  Disable the check for
now until we figure out a better solution.

Bug: 136664286
Test: Local build and Forrest Run
Change-Id: I9db5cb227780ede6aaff0070cd2fd59e95e635e6
(cherry picked from commit c41a28cb)